June 1918

• The Spanish flu epidemic became a pandemic, killing over 30 million people over the next six months.{{cite web| url=http://www.pasteur.fr/infosci/conf/CRC/Grippe_CRC.ppt | publisher=Institut Pasteur | title=La Grippe Espagnole de 1918 |access-date=3 May 2011 |archive-url=https://web.archive.org/web/20110604144218/http://www.pasteur.fr/infosci/conf/CRC/Grippe_CRC.ppt |archive-date=June 4, 2011 |url-status=dead }}
• Battle of Belleau Wood – The U.S. Army 2nd Infantry Division deployed troops, including the 5th and 6th Marine Regiments, to hold Belleau Wood near the Marne River in France after the towns of Château-Thierry and Vaux fell to the Germans.{{Cite book| title=The U.S. Marine Corps Story| first=J. Robert| last=Moskin| publisher=Little, Brown and Company| year=1992| location=Canada| page=106}}
• Australian flying ace Roderic Dallas was killed while flying a solo mission over Liévin, France. Dallas was the highest-ranking Australian ace of the World War I, with his victories ranging from an official count of 39 to other sources claiming up to 51 victories.Franks, Norman, Aircraft vs. Aircraft: The Illustrated Story of Fighter Pilot Combat From 1914 to the Present Day, London: Grub Street, 1998, {{ISBN|1-902304-04-7}}, pp. 38, 62{{cite web| title=Dallas, Roderic Stanley (1891–1918)| url=http://www.adb.online.anu.edu.au/biogs/A080216b.htm?hilite=Roderic%3BDallas |work=Australian Dictionary of Biography|access-date= 25 October 2014}}
• The first of two giant German Zeppelin-Staaken bombers lost to enemy action in World War I was shot down by anti-aircraft guns over the French lines.Guttman, Robert, "German Giant," Aviation History, September 2014, p. 15
• The Royal Air Force established air squadrons No. 159{{cite web|title=History of 159 Squadron| url=https://www.raf.mod.uk/history/159squadron.cfm| website=Royal Air Force| access-date=13 December 2017}} No. 162,{{cite web|title=History of 162 Squadron| url=https://www.raf.mod.uk/history/162squadron.cfm| website=Royal Air Force| access-date=13 December 2017}} and No. 163.{{cite web|title=History of 163 Squadron| url=https://www.raf.mod.uk/history/163squadron.cfm| website=Royal Air Force| access-date=13 December 2017}}
• The Royal Air Force Temporary Nursing Service was established, receiving the prefix Princess Mary in 1923 when the British princess (daughter of King George) became the service's patron.{{cite web|title=RAF – PM MDHU History|url=https://www.raf.mod.uk/PMRAFNS/history/pmmdhuhistory.cfm|website=www.raf.mod.uk|access-date=31 July 2017|language=en|archive-date=31 July 2017|archive-url=https://web.archive.org/web/20170731190940/https://www.raf.mod.uk/PMRAFNS/history/pmmdhuhistory.cfm|url-status=dead}}
• Tails Up!, a musical revue starring Jack Buchanan, opened at the Comedy Theatre in London where it ran for 467 performances.Carson, Lionel The Stage Year Book Carson & Comerford Limited, 1919, p. 103
• The bimonthly newspaper El Caribe published its first edition in Roatán, Honduras.Charno, Steven M. [https://books.google.com/books?id=HhUrXHgzu2MC Latin American Newspapers in United States Libraries; A Union List Compiled in the Serial Division, Library of Congress]. Austin: Published for the Conference on Latin American History by the University of Texas Press, 1969. p. 259
• U.S. President Woodrow Wilson signed a bill to direct the United States Mint to create the Illinois Centennial half dollar, a commemorative fifty-cent piece depicting Abraham Lincoln.{{cite web|url=http://congressional.proquest.com/legisinsight?id=PL65-163&type=LEG_HIST|title=65 Bill Profile H.R. 8764 (1917–1919)|access-date=March 26, 2017|url-access=subscription |id={{ProQuest|}} }}

• Battle of Belleau Wood – The first battalion of the 5th U.S. Marines forced a march over {{convert|10|km|mi}} to plug a gap covering {{convert|20|km}} in the Allied line that the Germans opened up the day before.Moskin 1992, pp. 107–108
• German submarine {{SMU|U-151||6}} shelled, torpedoed or scuttled six American ships off the coast of New Jersey in what was referred to as "Black Sunday", including passenger ship {{SS|Carolina||2}} which resulted in 13 deaths.{{cite web | title = "Black Sunday" – Victims of U-151 | publisher = Scuba Diving – New Jersey & Long Island New York | url = http://njscuba.net/sites/site_black_sunday.html | access-date = 2018-04-29 | archive-date = 2009-03-02 | archive-url = https://web.archive.org/web/20090302224930/http://njscuba.net/sites/site_black_sunday.html | url-status = dead }}
• The American Expeditionary Forces set up military hospitals in Bazoilles-sur-Meuse, France, when Hospital No. 116 designed to treat over 2,000 wounded American soldiers.{{cite book |editor-last=Budreau|editor-first=Lisa M. |editor-last2=Prior|editor-first2=Richard M. | title = Answering The Call: The U.S. Army Nurse Corps, 1917–1919: A commemorative Tribute to Military Nursing in world War I|year=2008| publisher = Government Publishing Office| isbn=9780160869365|url=https://babel.hathitrust.org/cgi/pt?id=uc1.c100316447;view=1up;seq=1|page=167}}
• Marion Davies produced and starred in her second feature film Cecilia of the Pink Roses, released through Select Pictures.[http://www.silentera.com/PSFL/data/C/CeciliaOfThePinkRoses1918.html Progressive Silent Film List: Cecilia of the Pink Roses] at silentera.com
• Born: Kathryn Tucker Windham, American columnist, known for narrative columns for the Selma Times-Journal; as Kathryn Tucker, in Selma, Alabama, United States (d. 2011){{citation needed|date=March 2025}}

File:Lloyd W. Williams, circa 1918 (17642877250).jpg Lloyd W. Williams]]

• Third Battle of the Aisne – Allied counterattacks halted the German advance at the Marne River. Allied casualties were massive at 127,000, including 98,000 French casualties and 29,000 British casualties. Germany suffered slightly more with 130,000 casualties.Hart 2008, p. 283
• Battle of Belleau Wood – The first battalion of the 5th U.S. Marines held ground and inflicted heavy casualties on the attacking Germans, forcing them back to the village of Vaux. Captain Lloyd W. Williams was said to have famously responded to a general order to fall back with: "Retreat? Hell, we just got here!"Moskin 1992, pp. 108–109 He was killed in the battle on June 12 while waiting for the surviving Marines under his command to be evacuated by medics. For his bravery and sacrifice, Williams was posthumously awarded three Silver Stars and promoted to major.{{cite book|last = Clark|first = George B.|title = Retreat, Hell! We Just Got Here!: A Brief Biographical Sketch of Lloyd W. Williams|publisher = The Brass Hat|year = 1994|oclc= 40761782|page=17}}
• The British General Post Office increased postage rates to a penny halfpenny for ordinary letters, bringing an end to the Uniform Penny Post which had existed since 1840. The rate for postcards doubled from a halfpenny to a penny.{{cite book| first=Richard| last=Blake| title=The Book of Postal Dates, 1635–1985| location=Caterham| publisher=Marden| page=24}}
• The Distinguished Flying Cross (DFC) was established as the official medal of the Royal Air Force. By the end of World War I, some 1,100 DFCs were awarded.{{cite book |last1=Carter |first1=Nick |last2=Carter |first2=Carol |year=1998 |title=The Distinguished Flying Cross and How It Was Won |url=https://books.google.com/books?isbn=190236600X |location=London |publisher=Savannah Publications |isbn=190236600X}}
• Bjørnøen was established as a mining company operating on Bear Island, Norway. It became nationalized in 1932 under the Ministry of Trade and Industry of Norway.{{cite web|url=https://snl.no/Kings_Bay_AS|title= Kings Bay AS|publisher = Store norske leksikon|author= Rolf Bryhn |access-date= October 1, 2016}}{{cite web| url=https://www.regjeringen.no/no/dokumenter/kongelig-resolusjon-opprettelse-av-bjorn/id444518/|title= Kongelig resolusjon – Opprettelse av Bjørnøya naturreservat på Svalbard |publisher = Regjeringen.no|access-date= October 1, 2016}}
• The sports club Holter was established in Nannestad, Norway with sections for football and handball.{{cite web|url=http://idrett.speaker.no/Organisation.asp?WCI=wiKlubbKassaNews&WCU=546191 |archive-url=https://web.archive.org/web/20080525143221/http://idrett.speaker.no/Organisation.asp?WCI=wiKlubbKassaNews&WCU=546191 |url-status=dead |archive-date=25 May 2008 |title=Om Holter IF |publisher=Holter IF |language=no |access-date=14 November 2009 }}
• Born: Patrick Cargill, British actor, best known for the lead title role in British television sitcom Father, Dear Father; in Bexhill-on-Sea, England (d. 1996){{citation needed|date=March 2025}}
• Died: Ramón Maximiliano Valdés, 50, Panamanian state leader, 7th President of Panama (b. 1867){{citation needed|date=March 2025}}

• The Ottoman Empire signed a treaty with Armenia, Azerbaijan, and Georgia, ending most of the fighting in the Caucasus region.{{cite book |first=Charlotte Mathilde Louise |last=Hille |title=State Building and Conflict Resolution in the Caucasus |publisher=Brill |year=2010 |isbn=978-9-004-17901-1 |page=71}}{{cite book |first=Alexander |last=Mikaberidze |title=Conflict and Conquest in the Islamic World |publisher=ABC-CLIO |year=2011 |isbn=978-1-598-84337-8 |page=201 |author-link=Alexander Mikaberidze}}
• Battle of Belleau Wood – U.S. Army Major General Omar Bundy took command of the 2nd Infantry Division as the U.S. Marines continued to repel German attacks over the next 48 hours.Moskin 1992, pp. 108–109
• The French Army established the 503rd Combat Tank Regiment.{{cite book |title=Avec les chars d'assaut |trans-title=With the tanks |first=Marcel |last=Fourier |publisher=Hachette |year=1919 |location=Témoins |pages=308–310}}
• The inaugural flight of the Dornier-Zeppelin, the first all-metal stressed-skin fighter to be tested, took place.{{cite book |last=Grosz |first=Peter |title=Dornier D.I Windsock Mini datafile # 12 |publisher=Albatros Publications |location=Hertfordshire, UK |year=1998 |isbn=9780948414923 |page=8}}
• Born: Johnny Klein, American drummer, lead percussionist on The Lawrence Welk Show and second cousin to Lawrence Welk; as John A. Klein, Jr., in Strasburg, North Dakota, United States (d. 1997){{citation needed|date=March 2025}}
• Died:
• Charles W. Fairbanks, 66, American state leader, 26th Vice President of the United States (b. 1852){{citation needed|date=March 2025}}
• Hāmiora Mangakāhia, 87–88, Māori leader, first Premier of Te Kotahitanga in New Zealand (b. 1838){{citation needed|date=March 2025}}
• David Lawrence Anderson, 55–56, American law enforcement officer and former outlaw known as "Billy Wilson", shot and killed in the line of duty (b. 1862){{cite web |url=https://www.odmp.org/officer/16781-sheriff-david-l-doc-anderson |title=Sheriff David L. "Doc" Anderson, Terrell County Sheriff's Office, Texas |publisher=The Officer Down Memorial Page, Inc |access-date=19 April 2024}}

• British armed boarding steamer HMS Snaefell was torpedoed and sunk in the Mediterranean Sea by German submarine {{SMU|UB-105||6}}, with all crew surviving.{{cite web |url=http://uboat.net/wwi/ships_hit/5615.html |title=Snaefell |publisher=Uboat.net |access-date=14 November 2012}}
• Douglas Campbell, the first American to become an ace while flying for an American-trained unit, scored his sixth and final victory. He was badly wounded during the flight and grounded from future combat missions.Nieuport Aces of World War 1. Norman Franks. Osprey Publishing, 2000. {{ISBN|1-85532-961-1}}, {{ISBN|978-1-85532-961-4}}, p. 72
• The Afrikaner Broederbond, a confidential cultural Afrikaner organisation, was founded in Johannesburg.{{cite web| url=http://africanhistory.about.com/library/glossary/bldef-broederbond.htm| title=Jong Suid Afrika – founded in June 1918| access-date=2018-04-29| archive-date=2009-04-27| archive-url=https://web.archive.org/web/20090427000519/http://africanhistory.about.com/library/glossary/bldef-broederbond.htm| url-status=dead}}

File:DanielDaly.jpg Daniel Daly]]

• Third Battle of the Aisne – German forces were within {{convert|56|km|mi}} of Paris, forcing many civilians to flee and the French government to draw up plans to evacuate to Bordeaux. Casualties were high on both sides with 127,000 for the Allies and 130,000 for Germany.Hart, Peter (2008). 1918: A Very British Victory, Phoenix Books, London. {{ISBN|978-0-7538-2689-8}}, p. 296
• Battle of Goychay – Grigory Korganov, one of the Soviet commissars for Baku, issued an order for the Red Army to attack Ganja, Azerbaijan. This forced the Azerbaijani government to call on the Ottoman Empire for aide against the Soviet threat.Firuz Kazemzadeh. Struggle For Transcaucasia (1917–1921), New York Philosophical Library, 1951
• Battle of Belleau Wood – The first battalion of the 5th U.S. Marines with French support launched an attack and captured the German defensive position Hill 142, at a cost of nine officers and 325 men. During German counterattacks, Gunnery Sergeant Ernest A. Janson held off a dozen German soldiers and became the first Marine to receive a Medal of Honor in World War I.Moskin 1992, pp. 109–111 The day was also marked in U.S. Marines historical lore as the day Gunnery Sergeant Daniel Daly was said to have shouted at his men to advance with the words: "Come on, you sons of bitches, do you want to live forever?"{{cite book |last=Adams|first=Gregg & Illustrated by Steve Noon| title = US Marine vs German Soldier: Belleau Wood 1918|year=2018| publisher = Bloomsbury Publishing| isbn= 9781472825568|page=28}}
• Dutch hospital ship Koningin Regentes was torpedoed and sunk in the North Sea by German submarine {{SMU|UB-107||6}}, killing seven crew.{{cite web |url=http://uboat.net/wwi/ships_hit/3380.html |title=Koningin Regentes |publisher=Uboat.net |access-date=15 November 2012}}{{cite web |url=http://www.wrecksite.eu/wreck.aspx?70926 |title=PSS Koningin Regentes [+1918] |publisher=wrecksite.eu |date=22 October 2009 |access-date=14 July 2016}}
• The Independent Air Force was established as a strategic bombing force separate from the Royal Air Force during World War I.{{cite book |title=Pictorial History of the RAF |last1=Taylor |first1=J. W. R. |last2=Moyes |first2=P.J.R. |year=1968 |publisher=Ian Allan |location=Shepperton |pages=16, 17 |isbn=978-0-7110-0132-9}}
• The football club Sandviken was established in Sandviken, Sweden.{{cite web |url= https://svenskfotboll.se/svensk-fotboll/om-svff/distrikten/?ffid=6 |title= Distrikten Kontaktuppgifter och tävlingar – Gestriklands Fotbollförbund – Svenskfotboll.se |access-date=2011-01-10}}
• Born:
• Kenneth Connor, English comedian, known for his roles in the Carry On film series; in Islington, London, England (d. 1993){{citation needed|date=March 2025}}
• Edwin G. Krebs, American biochemist, recipient of the Nobel Prize in Physiology or Medicine for his research into the phosphorylation; in Lansing, Iowa, United States (d. 2009){{citation needed|date=March 2025}}

• Battle of Belleau Wood – The third battalions of the 5th and 6th U.S. Marines launched an assault on Belleau Wood where they gained a foothold in the forest, despite losing 31 officers and 1,056 men.Moskin 1992, pp. 99–100, 102
• The British colonial government in Nigeria arrested 70 chiefs of the Egba people as part of a crackdown on a general rebellion against direct taxation, forced labor laws, and other protests against the British authority.{{cite thesis |last=Oduntan |first=Oluwatoyin B. |title=Elite Identity and Power: A Study of Social Change and Leadership among the Egba of Western Nigeria 1860–1950 |type=PhD |url=http://www.obafemio.com/uploads/5/1/4/2/5142021/egba_leadership.pdf |access-date=12 November 2017 |year=2010 |publisher=Dalhousie University |location=Halifax, Nova Scotia |page=218 |oclc=812072776}}
• Died: Victor Duleep Singh, 51, Indian noble, last Maharaja of Lahore, Punjab, British India and the Sikh Empire, grandson of Ranjit Singh (b. 1866){{citation needed|date=March 2025}}

Image:Black Watch in Palestine June 1918 IWM photo Q 012484.jpg Scottish infantry defend trenches against Ottoman forces in Arsuf Palestine.]]

• German Caucasus expedition – A force of 3,000 German soldiers were dispatched to the port city of Poti, Georgia to support the Ottoman Third Army in the South Caucasus region.Erickson, Edward J. (2000) Ordered to Die: a history of the Ottoman army in the first World War, p. 186Lang, David Marshall (1962). A Modern History of Georgia, p. 182. London: Weidenfeld and Nicolson
• Battle of Belleau Wood – American and German forces were locked into a stalemate at Belleau Wood.Moskin 1992, p. 112
• Action of Arsuf – British captured two key Ottoman observation positions over the Auju River in central Palestine, killing 217 and capturing another 300 Ottoman troops. The British had 62 men killed and 110 wounded.{{London Gazette|date=5 November 1918|issue=30994|supp=y|page=13108}}
• The counterrevolutionary government Committee of Members of the Constituent Assembly was established in Samara, Russia, during the city's occupation by the Czechoslovak Legion.Ronald I. Kowalski, The Russian Revolution 1917–1921, p. 116
• The nova V603 Aquilae, the brightest observed since Kepler's Supernova of 1604, was discovered by amateur astronomer Zygmunt Laskowski and later confirmed by amateur astronomer Grace Cook.The Contribution of Amateurs to Astronomy, Proceedings of Colloquium 98 of the International Astronomical Union, June 20–24, 1987, page 41{{cite book| last=Mobberley| first=Martin | title=Cataclysmic Cosmic Events and How to Observe Them| publisher=Springer| date=2009| pages=46| isbn=978-0387799469| url=https://books.google.com/books?id=-WQCJOkVfsUC&q=Nova+Aquilae+1918&pg=PA48}}
• The South African financial services group Sanlam was established in Cape Town.{{cite web| url=https://www.sanlam.co.za/about/Pages/default.aspx |title=About |publisher=Sanlam |access-date=2016-07-28}}
• A solar eclipse was observed by the United States Naval Observatory in Baker City, Oregon, and crossed the United States from Washington to Florida.{{cite journal| last=Hammond| first=J.C.| title=The Naval Observatory eclipse expedition, June 8, 1918| journal=Popular Astronomy| year=1919| volume=27| issue=1| bibcode=1919PA.....27....1H | page=1}}{{cite journal|last=Motherwell|first=R.M.|title=The Total Solar Eclipse, June 8, 1918|journal=Journal of the Royal Astronomical Society of Canada|year=1918|volume=12|pages=160–168A|bibcode=1918JRASC..12..160M}}
• Born:
• Robert Preston, American actor, known for leading roles in both the stage and film versions of The Music Man, as well as roles in How the West Was Won, S.O.B. and Victor/Victoria; as Robert Preston Meservey, in Newton, Massachusetts, United States (d. 1987){{citation needed|date=March 2025}}
• George Edward Hughes, Irish-born New Zealand philosopher, known for works of logic and medieval philosophy, author of The Elements of Formal Logic; in Waterford, Ireland (d. 1994){{citation needed|date=March 2025}}
• Leonard Greene, American aviation engineer, known to invent over 200 patents related to aviation technology; in New York City, United States (d. 2006){{citation needed|date=March 2025}}
• Died: Ben Brush, 24–25, American race horse, 1896 Kentucky Derby champion (b. 1893){{citation needed|date=March 2025}}

• German spring offensive – German forces launched the fourth stage of their offensive against the Allies on the Western Front with Operation Gneisenau, beginning with 21 German divisions attacking over a {{convert|23|mi|km|abbr=on}} front along the Matz River in France, resulting in an advance of {{convert|9|mi|km}}.Hart 2008, pp. 294–296
• Battle of Belleau Wood – American and French artillery barraged Belleau Wood but failed to dislodge German defences.Moskin 1992, p. 112
• A general election was held in San Marino to elect the fifth Grand and General Council, with all politicians elected to its 60 seats being nonpartisan.Dieter Nohlen & Philip Stöver (2010) Elections in Europe: A data handbook, p. 1678 {{ISBN|978-3-8329-5609-7}}
• Theda Bara starred in the silent drama Under the Yoke, which became noteworthy in its controversy in later years for its depiction of Filipinos and the one-sided view of American occupation in the Philippines.Dr. Nathan Bradford, "1901–1935: How Americans and Filipinos regarded each other" in "Proceedings of the Second International Academic Conference on the Cultural Images of Colonial Domination", Cape Town, 1999
• The Main Northern Line opened the North Strathfield railway station in Sydney.[http://www.nswrail.net/locations/show.php?name=NSW:North+Strathfield North Strathfield Station] NSWrail.net[http://www.environment.nsw.gov.au/heritageapp/ViewHeritageItemDetails.aspx?ID=4801029 North Strathfield Railway Station Group] NSW Environment & Heritage
• Born: John Hospers, American philosopher, developer of American libertarianism, presidential candidate for the Libertarian Party during the 1972 American presidential election; in Pella, Iowa, United States (d. 2011){{citation needed|date=March 2025}}
• Died: Anna Dostoevskaya, 71, Russian writer, second wife to Fyodor Dostoevsky, author of Anna Dostoyevskaya's Diary in 1867 and Memoirs of Anna Dostoyevskay (b. 1846){{citation needed|date=March 2025}}

Image:This battle scene was painted in 1919 by artist Frank Schoonover of the Battle of Belleau Wood.jpg charging German defenses in Belleau Wood (painting by Frank Schoonover).]]

• Battle of Belleau Wood – The first battalion of the 6th U.S. Marines attacked German defenses at the north end of Belleau Wood, but were stopped by machine gun fire and mustard gas.Moskin 1992, pp. 112–113
• German Caucasus expedition – Ottoman forces attacked Vorontsovka, Armenia, but it led to Germany threatening to pull its military support from the region. The Ottoman Empire conceded and stopped its advance into Armenia.Erickson 2000, pp. 186–187
• Battle of Goychay – Red Army forces gathered at Kazi-Magomed, Azerbaijan, where they looted and burned Muslim villages in the surrounding area before marching on Ganja.{{cite book|author=Süleymanov|title= Qafqaz İslam Ordusu və Azərbaycan|pages=189–190}}
• Austro-Hungarian battleship SMS Szent István was sunk by two Italian torpedo boats off the coast of Dalmatia, killed 89 crew.{{cite book | last = Sokol | first = Anthony | year = 1968 | title = The Imperial and Royal Austro-Hungarian Navy | publisher = Naval Institute Press | location = Annapolis, MD | pages = 131–135 }}
• Born: Barry Morse, English-Canadian actor, best known for the roles of Lt. Philip Gerard in the hit TV series The Fugitive and Professor Victor Bergman in the 1970s science fiction series Space: 1999; as Herbert Morse, in London, England (d. 2008){{citation needed|date=March 2025}}
• Died: Arrigo Boito, 76, Italian poet and composer, member of the Scapigliatura movement in Italy (b. 1842){{citation needed|date=March 2025}}

• German spring offensive – A French force of four divisions and 150 tanks under command of Charles Mangin launched a surprise counterattack on the Germans at Compiègne, France, and halted the advance.Hart 2008, p. 298
• Battle of Belleau Wood – The first battalion of the 5th U.S. Marines attacked German defenses on the west side Belleau Wood and managed to smash through despite heavy casualties.Moskin 1992, p. 113
• Battle of Goychay – Red Army forces occupied the towns of Kürdəmir, Maraza, and Shamakhi in Azerbaijan. However, their advance was halted at Bijo.{{cite book|first=Seyfəddin |last=Qəniyev|title=1918 – ci il Şamaxı soyqırımı |edition=I kitab |pages=22}}
• British soldiers were dispatched from German East Africa to assist local authorities in quelling unrest in Nigeria.{{cite book|title=Cross and Scalpel: Jean-Marie Coquard Among the Egba of Yorubaland |first=Edmund M. |last=Hogan |year=2013 |publisher=Heinemann Educational Books |location=Portsmouth, NH |isbn=978-978-081-287-4|page=304}}
• The Committees of Poor Peasants was established by the People's Commissariat for Food Supplies to address food shortages among the rural peasantry caused in part by the Russian Civil War.George Jackson and Robert Devlin (eds.), Dictionary of the Russian Revolution. Westport, CT: Greenwood Press, 1989; pp. 145–146
• Born: Ruth Aarons, American table tennis player, gold medalist at the World Table Tennis Championships in 1936 and 1937; in Stamford, Connecticut, United States (d. 1980){{citation needed|date=March 2025}}

• German spring offensive – Heavy casualties from French counterattacks forced the Germans to call off further advances along the Matz River in France. The Allies sustained 35,000 casualties and the Germans had 30,000 casualties.Hart 2008, p. 298
• Haiti held a referendum on its new constitution, with 99% of voters approving it.Nohlen, D (2005) Elections in the Americas: A data handbook, Volume I, p. 381 {{ISBN|978-0-19-928357-6}}
• Grand Duke Michael Alexandrovich of Russia was assassinated, the first of the Romanov family to be murdered by the Bolsheviks.{{cite book|last1=Crawford|first1=Rosemary|last2=Crawford|first2=Donald|title=Michael and Natasha: The Life and Love of the Last Tsar of Russia| date=1997| publisher=Weidenfeld & Nicolson|location=London|isbn=978-0-7538-0516-9|pages=354–362}}
• Captain Roy Phillipps of the Australian Flying Corps No. 2 Squadron scored his 11th victory by shooting down five German fighters – three Fokker triplanes, an LVG, and a Fokker fighter plane – in a single patrol over Ribécourt-la-Tour, France. German flying ace Fritz Loerzer, commanding officer of the Jagdstaffel 26, was the pilot of the Fokker plane when it crashed, allowing him to be captured. Phillipps received the Distinguished Flying Cross for the patrol.{{cite book |last=Newton |first=Dennis |year=1996 |title=Australian Air Aces |location=Fyshwyck, Australian Capital Territory |publisher=Aerospace Publications |isbn=1-875671-25-0| page=53}}
• The Royal Air Force established air squadron No. 151.{{cite web|title=History of 151 Squadron| url=https://www.raf.mod.uk/history/151squadron.cfm| website=Royal Air Force| access-date=13 December 2017}}
• Born:
• Bruce Alger, American politician, U.S. Representative of Texas from 1955 to 1965; in Dallas, United States (d. 2015){{citation needed|date=March 2025}}
• Arthur Iberall, American physicist, developer of homeokinetics; in New York City, United States (d. 2002){{citation needed|date=March 2025}}

• The Eastern Front formed in the Russian Civil War.{{cite book|last=Smele|first=Jonathan D.|title=Historical Dictionary of the Russian Civil Wars, 1916–1926|url=https://books.google.com/books?id=QwquCgAAQBAJ&pg=PA991|publisher=Rowman & Littlefield Publishers|isbn=978-1-4422-5281-3|pages=357–358|date=2015-11-19}}
• A total of 30,000 rebels among the Egba people in Nigeria began coordinated strikes on British-held facilities.{{sfn|Hogan|2013|p=304}}
• Royal Navy cruiser {{HMS|Conquest|1915|6}} struck a mine and was damaged in the North Sea with the loss of seven of her crew.{{cite web |url=http://uboat.net/wwi/ships_hit/7676.html |title=HMS Conquest |publisher=Uboat.net |access-date=21 November 2012}}
• Born:
• Ben Johnson, American actor, best known for his roles in film Westerns for John Ford and Sam Peckinpah, recipient of the Academy Award for Best Supporting Actor for The Last Picture Show; as Francis Benjamin Johnson Jr., in Foraker, Oklahoma, United States (d. 1996){{citation needed|date=March 2025}}
• Helmut Lent, German air force officer, commander of the Nachtjagdgeschwader (Night Flyer) squadrons for the Luftwaffe during World War II, recipient of the Knight's Cross of the Iron Cross; in Pyrehne, German Empire (present-day Pyrzany, Poland) (d. 1944, killed in action){{citation needed|date=March 2025}}
• Frazier Thomas, American television personality, host of the television children's show Garfield Goose and Friends; as William Frazier Thomas, in Rushville, Indiana, United States (d. 1985){{citation needed|date=March 2025}}
• Died: Charles Johnston, 72, New Zealand politician, 14th Speaker of the New Zealand Legislative Council (b. 1845){{citation needed|date=March 2025}}

• The Imperial Commercial College of Saint Petersburg was brought under control of the Commission on Public Education of the Northern Workers, and subsequently ceased functioning as an educational institution.{{cite book |author=Baranenko A. V., Molodcova N. S. |title=House at the "Five Corners" (from a Commercial College to the University) |language=ru |location=Saint Petersburg |publisher=СПбГУТД |date=2006 |page=68 |isbn=5-7937-0224-5}}
• Born: Francis Burt, Australian judge and politician, 11th Chief Justice of Western Australia and 29th Governor of Western Australia; in Cottesloe, Western Australia, Australia (d. 2004){{citation needed|date=March 2025}}
• Died: George Morton Randall, 76, American army officer, noted commander during the American Civil War and American Indian Wars (b. 1841){{citation needed|date=March 2025}}

Image:The Battle of the Piave River, June 1918 Q19081.jpg land from barges to take up battle positions on the Piave River in northern Italy.]]

• Second Battle of the Piave River – The Austro-Hungarian Army under command of Svetozar Boroević launched 58 divisions against 52 divisions of the Italian Army under command of Armando Diaz, supported from by British and French units, along the Piave River in northern Italy.{{cite book |last=Clodfelter |first=M. |title=Warfare and Armed Conflicts: A Statistical Encyclopedia of Casualty and Other Figures, 1492–2015 |publisher=McFarland |location=Jefferson, North Carolina |year=2017 |edition=4th |isbn=978-0786474707 |page=419}} The attack was ill-timed with the river higher due to spring thaw, trapping many Austro-Hungarian troops on the wrong side and making them easy targets for Italian fire. It was estimated 20,000 soldiers drowned trying to cross the river.Halsey, Francis Whiting: The Literary Digest History of the World War: Compiled from Original and Contemporary Sources. Funk & Wagnalls Company, 1919, V.9, p. 143
• Lieutenant General Józef Haller, commander of the Polish Army, signed an agreement to fight with the Allies resulting in the reorganization of Polish military units into what was collectively known as the Murmańczycy.Jerzy Krzyś, Pomorski Pułk Strzelców Murmańskich, Wydawnictwo: Ajaks, 1993 {{ISBN|83-85621-22-9}} p. 64
• Australian steamship {{SS|Makambo||2}} ran aground at the northern end of Lord Howe Island in the Tasman Sea. The vessel was refloated nine days later, but in that time black rats left the vessel and went ashore. The following years, the rat population exploded and wreaked havoc on the island's ecosystem, leading to the extinction of several of the island's birds and ravaging the sole crop on the island of kentia palm.Hindwood, K.A. (1940). The Birds of Lord Howe Island. Emu 40: 1–86.
• Edward Brittain, brother to Vera Brittain, was killed by a sniper during the Second Battle of the Piave River on the Italian Front. His death added to the already heavy grief Vera experienced with the war deaths of Vera's fiancé Roland Leighton and close friends Victor Richardson and Geoffrey Thurlow earlier in World War I. All four men were featured prominently in her memoir Testament of Youth.Mark Bostridge, Vera Brittain and the First World War: The Story of Testament of Youth (Bloomsbury Publishing, 2014), Kindle edition; Paul Berry and Mark Bostridge, Vera Brittain: A Life (Chatto & Windus, 1995)
• Born: François Tombalbaye, Chadian state leader, first President of Chad; in Moyen-Chari, French Chad (present-day Chad) (d. 1975, assassinated){{citation needed|date=March 2025}}

• Second Battle of the Piave River – Austro-Hungarian forces under command of Franz Conrad von Hötzendorf failed to capture Vicenza, with a loss of 40,000 men.Rothenburg, G. The Army of Francis Joseph. West Lafayette: Purdue University Press, 1976. p. 213
• Battle of Goychay – Red Army forces defeated Azerbaijani and Georgian militias and forced them to retreat to the city of Goychay, while also threatening the towns of Aghsu, Garamaryam and Bygyr.{{cite book|first=Seyfəddin |last=Qəniyev|title=1918 – ci il Şamaxı soyqırımı |edition=I kitab |pages=22}}
• British diplomat Henry McMahon published the Declaration to the Seven as the official British government response to a memorandum issued anonymously by seven Syrian notables in Cairo, which requested from the Allies a "guarantee of the ultimate independence of Arabia".{{cite web |url=http://domino.un.org/unispal.nsf/3d14c9e5cdaa296d85256cbf005aa3eb/4c4f7515dc39195185256cf7006f878c!OpenDocument |title=Report of a Committee set up to consider certain correspondence between Sir Henry McMahon (his Majesty's high commissioner in Egypt) and the Sharif of Mecca in 1915 and 1916|publisher=His Majesty's Stationery Office |date=1939-03-16 |archive-url=https://web.archive.org/web/20080618062554/http://domino.un.org/unispal.nsf/3d14c9e5cdaa296d85256cbf005aa3eb/4c4f7515dc39195185256cf7006f878c%21OpenDocument |archive-date=2008-06-18 |url-status=dead }}

• Battle of Goychay – The Red Army defeated Ottoman forces west of the town of Garamaryam with a loss of 200 casualties.{{cite book|author=Rüşdü|title=Böyük Hərbdə Bakı yollarında|pages=45–46}}
• German submarine SM U-64 was depth charged, shelled and sunk in the Mediterranean Sea by Royal Navy patrol ship HMS Lychnis with the loss of 38 of her 43 crew.{{cite Uboat.net|name=U 64|id=64|type=1sub}}
• The Ministry of Healthcare for the government of Azerbaijan was established.{{cite web |url=http://azerbaijan.tourism.az/index.php?%2Faz%2Ftopmenu_content%2F1111 |title=Səhiyyə Nazirliyi |trans-title=Ministry of Healthcare |access-date=2010-11-10 |archive-date=2012-07-07 |archive-url=https://archive.today/20120707072214/http://azerbaijan.tourism.az/index.php?/az/topmenu_content/1111 |url-status=dead }}
• Ball State University was established in Muncie, Indiana, with an initial enrollment of 235 students.Anthony O. Edmonds and E. Bruce Geelhoed, Ball State University: An Interpretive History (Bloomington, IN: Indiana University Press, 2001), p. 51
• The Latvian Social Democratic Workers' Party was established in Riga.Kowalski, Werner. [https://books.google.com/books?id=83QdPwAACAAJ Geschichte der sozialistischen arbeiter-internationale: 1923–19-]. Berlin: Dt. Verl. d. Wissenschaften, 1985
• The Great Central Railway opened Sealand railway station to serve military personnel at the training camp in Sealand, Flintshire, Wales.{{cite book|title=Wrexham to New Brighton| first1=Vic| last1=Mitchell| first2=Keith| last2=Smith| publisher=Middleton Press| location=West Sussex| year=2013| isbn=9781908174475| oclc=859543196| page=62}}
• Born:
• Ajahn Chah, Thai religious leader, major founder of Theravada Buddhism; as Chah Chuangchot, in Ubon Ratchathani, Siam (present-day Thailand) (d. 1992){{citation needed|date=March 2025}}
• Carmen Casco de Lara Castro, Paraguayan activist, founder of the Cultural Institute of Refuge for Women, the first independent human rights organizations in Latin America; in Asunción, Paraguay (d. 1993){{citation needed|date=March 2025}}
• Died: Frank Leaman Baylies, 22, American air force officer, member of French flight squadrons Escadrille 73 and Escadrille 3, recipient of the Legion of Honour, Médaille militaire and Croix de Guerre; killed in action (b. 1895){{citation needed|date=March 2025}}

• The Imperial Russian Navy scuttled 10 warships, including battleship Svobodnaya Rossiya, at Novorossiysk, Russia, instead of handing them over to Germany under the stipulations of the Treaty of Brest-Litovsk.{{cite book |last=McLaughlin |first= Stephen |title= Russian & Soviet Battleships |publisher=Naval Institute Press |location= Annapolis, MD |year=2003 |isbn= 1-55750-481-4 |page= 308}}
• British cargo ship {{SS|Dwinsk||6}} was torpedoed and damaged by German submarine {{SMU|U-151||2}} in the Atlantic Ocean {{convert|400|mi|nmi km|lk=on|abbr=on}} from Bermuda. A total 22 crew were killed in the attack. U.S. Navy troopship USS Von Steuben chased the submarine and fired on it, but damage was minor and the German vessel escaped.{{cite book | last = Drechsel | first = Edwin | title = Norddeutscher Lloyd, Bremen, 1857–1970: History, Fleet, Ship Mails, Volume 1 | location = Vancouver, British Columbia | publisher = Cordillera Pub. Co | year = 1994 | isbn = 978-1-895590-08-1 | oclc = 30357825 | page = 191 }}
• The Second Red Army was established to defend the newly formed Eastern Front in the Russian Civil War.Smele, p. 991
• The first of the Guagua National Colleges was established in Guagua, Philippines.{{cite web|title=History-GNC| url=http://gnc.edu.ph/| website=GNC| publisher=GNC Portal| access-date=3 December 2017}}
• Born:
• Jerome Karle, American chemist, recipient of the Nobel Prize in Chemistry for research into crystal structures; as Jerome Karfunkle, in New York City, United States (d. 2013){{citation needed|date=March 2025}}
• Franco Modigliani, Italian-American economist, recipient of the Nobel Memorial Prize in Economic Sciences for development of Neo-Keynesian economics; in Rome, Kingdom of Italy (present-day Italy) (d. 2003){{citation needed|date=March 2025}}
• Reinaldo Gorno, Argentine marathon runner, silver medalist at the 1952 Summer Olympics; in Yapeyú, Corrientes, Argentina (d. 1994){{citation needed|date=March 2025}}

• Second Battle of the Piave River – General Armando Diaz, Chief of Staff of the Italian Army, ordered a counterattack against the flank of the attacking Austro-Hungarian force, which inflicted heavy casualties.Halsey 1919, p. 143
• Italian flying ace Francesco Baracca was killed during a flying mission in northern Italy. He had 34 confirmed victories at the time of his death.{{cite book|last1=Franks|first1=Norman|title=Nieuport Aces of World War 1|date=2000|publisher=Osprey Publishing|isbn=978-1-85532-961-4|page=76}}
• Columbia Pictures, an American film studio owned by Sony Pictures Entertainment, was founded by Harry Cohn, Jack Cohn and Joe Brandt.{{citation needed|date=March 2025}}

• German submarine {{SMU|UC-64||6}} struck a mine and sank in the Strait of Dover with the loss of all 30 crew.{{cite web |url=http://uboat.net/wwi/boats/index.html?boat=UC+64 |title=UC 64 |publisher=Uboat.net |access-date=23 December 2012}}
• Eighteen United States Army Air Service cadets undergoing training by the Royal Italian Army's Military Aviation Corps arrived at the Italian Front for bombing operations against Austria-Hungary under the command of Captain Fiorello La Guardia. American cadet Clarence Young was shot down and killed during the mission, becoming the first of three American aircrew casualties suffered while flying with the Italians during World War I.Blumberg, Arnold, "Bombing, Italian Style," Aviation History, November 2015, p. 50.
• Arthur Griffith of Sinn Féin won a by-election in East Cavan, Ireland making it the first victory of the year for the political party after three successive by-election defeats.Maume, Patrick: The long Gestation, Irish Nationalist Life 1891–1918 p. 207 (note 322), Gill & Macmillan (1999); {{ISBN|0-7171-2744-3}}
• Born: Sergei Scherbakov, Russian boxer, silver medalist at the 1952 Summer Olympics; in Moscow, Russian SFSR (d. 1994){{citation needed|date=March 2025}}

• Pressure over the major loss of Skra, Macedonia forced Vasil Radoslavov to resign as Prime Minister of Bulgaria, allowing moderate leader Aleksandar Malinov to succeed him. Radoslavov fled the country shortly after the end of the war.S.G. Evans, A Short History of Bulgaria, London, Lawrence and Wishart, 1960, p. 156
• U.S. Navy cruiser USS Schurz was accidentally rammed and sunk in the Atlantic Ocean by a U.S. Coast Guard ship with the loss of a crew member.{{cite book|title=Dictionary of American Naval Fighting Ships: Historical Sketches—Letters R through S|volume=VI|publisher=Department of the Navy|location=Washington DC|oclc=769806180|page=381}}
• Born: Josephine Webb, American engineer, inventor of the switchgear, founding member of the Society of Women Engineers; as Josephine Rohas, in Niagara Falls, New York, United States (d. 2017){{citation needed|date=March 2025}}

File:Train wreck at Hammond Circus Train Wreck, at Hammond, Indiana June 22, 1918.png in Hammond, Indiana.]]

• A collision between a circus train and passengers cars on the Michigan Central Railroad in Hammond, Indiana, caused a fire that killed 86 people and injured 127 others.{{cite book| url= https://books.google.com/books?id=lUHcZ_xWmPkC&q=sargent| title=The Great Circus Train Wreck of 1918: Tragedy on the Indiana Lakeshore|author=Richard M. Lytle| publisher=The History Press| year=2011| isbn=9781614231707}}
• Four suspects along with more than 100 waiters were arrested in Chicago after widespread incidents of restaurateurs being poisoned with antimony potassium tartrate, a drug better known for its street name Mickey Finn.{{Citation | title = Drugs to the Non-Tippers Arrested Chicago Waiters Confess Poisoning Hotel Guests. Detective Seize Large Quantity | work= The Kansas City Times | date = June 23, 1918 | page = 3}}{{Citation | title = Charge Waiters Gave Poison to Tipless Diners Alleged Drug Maker, His Wife and Two Bartenders | work= Duluth News Tribune | date = June 24, 1918 | page = 1}}{{Citation | title = Waiters Taken For Drugging Nontippers — Hoyne gets evidence of plot against Hotel Guests | work= Chicago Daily Tribune| date = June 23, 1918 | page = 1}}
• Norwegian tennis player Molla Bjurstedt defeated American contender Eleanor Goss 6–4, 6–3 in a challenge round to win the title for the U.S. National Championships women's singles at the Philadelphia Cricket Club in Chestnut Hill, Philadelphia. It was the last time a challenge round was used in the women's championship final.{{cite book| last=Collins| first=Bud| author-link=Bud Collins| title=The Bud Collins History of Tennis| year=2016| publisher=New Chapter Press| location=New York| isbn=978-1-937559-38-0| page=497| edition=3rd}}
• Born:
• Cicely Saunders, English nurse and physician, pioneer of hospice care; in Chipping Barnet, London, England (d. 2005){{citation needed|date=March 2025}}
• Yeoh Ghim Seng, Singaporean politician, 5th Speaker of the Parliament of Singapore; in Ipoh, Perak, British Malaya (present-day Malaysia) (d. 1993){{citation needed|date=March 2025}}
• Died: John J. Keane, 78, Irish-American clergy, Bishop of Richmond from 1878 to 1900, Archbishop of Dubuque from 1900 to 1911, first rector for the Catholic University of America (b. 1839){{citation needed|date=March 2025}}

• Second Battle of the Piave River – Italian forces regained all ground lost in the Austro-Hungarian offensive and pushed the Austro-Hungarian Army back to its starting position. Allied forces suffered 87,181 casualties, but Austria-Hungary suffered more with 118,000 casualties.Tucker, Spencer. "World War I: Encyclopedia, Volume 1". p. 919
• Born: James Young, Irish comedian, known for his sketch comedy work for Group Theatre in Belfast, and the longest-running one-man show according to Guinness World Records; in Ballymoney, Ireland (d. 1974){{citation needed|date=March 2025}}

• Royal Navy submarine {{HMS|D6}} was sunk in the Atlantic Ocean by German submarine {{SMU|UB-73||6}} with the loss of 24 of her 26 crew.{{cite web |url=http://uboat.net/wwi/ships_hit/1530.html |title=D 6 |publisher=Uboat.net |access-date=12 November 2012}}
• The first scheduled Canadian airmail flight was made between Montreal and Toronto.{{cite web | url=http://www.torontoplaques.com/Pages_ABC/Canadas_First_Air_Mail.html |title=Canada's First Air Mail Historical Plaque |access-date=2012-07-18 |url-status=live |archive-url=https://web.archive.org/web/20160303212220/http://www.torontoplaques.com/Pages_ABC/Canadas_First_Air_Mail.html |archive-date=2016-03-03 }}
• Dickinson State University was established in Dickinson, North Dakota, first as a normal school to fill a need for qualified teachers in rural western North Dakota.{{citation |url=http://www.dickinsonstate.edu/discover_dsu/about_dsu/history.aspx |title=History Of Dickinson State University |publisher=Dickinson State University |access-date=February 11, 2012 |url-status=dead |archive-url=https://web.archive.org/web/20120426012614/http://www.dickinsonstate.edu/discover_dsu/about_dsu/history.aspx |archive-date=April 26, 2012 }}
• The Royal Air Force employed its new 1,650-lb (748-kg) bomb in combat for the first time when a Handley Page bomber with the No. 216 Squadron dropped one on Middelkerke, Belgium.{{cite book |title=Handley Page Aircraft Since 1907 |last=Barnes |first=Charles Henry |year=1987 |publisher=Putnam |location=London |isbn=978-0-85177-803-7|page=96}}
• Born: Elizabeth Eames, British archaeologist, leading expert on the medieval Anglo-Saxons; as Elizabeth Sara Graham, in Northampton, England (d. 2008){{citation needed|date=March 2025}}

• The Crimean Regional Government was established with support from Germany. The Red Army invaded and took control of the region the following year.Brian Boyd. Vladimir Nabokov: The Russian Years. Princeton University Press, 1993. p. 154
• The Original Dixieland Jazz Band released their third hit "Sensation Rag", written by band trombonist Eddie Edwards.Brunn, H.O. The Story of the Original Dixieland Jazz Band. Baton Rouge: Louisiana State University Press, 1960. Reprinted by Da Capo Press, 1977. {{ISBN|0-306-70892-2}}
• Born: P. H. Newby, British writer, author of Something to Answer For; as Percy Howard Newby, in Crowborough, England (d. 1997){{citation needed|date=March 2025}}
• Died:
• Jake Beckley, 50, American baseball player, first baseman for various Major League teams including the Cincinnati Reds and St. Louis Cardinals (b. 1867){{citation needed|date=March 2025}}
• Walter Boyd, 85, Irish judge, member of the Privy Council of Ireland from 1885 to 1916 (b. 1833){{citation needed|date=March 2025}}
• James Lide Coker, 81, American entrepreneur and philanthropist, founder of Sonoco and Coker College (b. 1837){{citation needed|date=March 2025}}
• James Douglas, 80, Canadian-American industrialist, leading developer of the mining industry in Arizona including the Copper Queen Mine, grandfather to Lewis Williams Douglas (b. 1837){{citation needed|date=March 2025}}

• Battle of Belleau Wood – The third battalion of the 5th U.S. Marines finally pushed the Germans out of Belleau Wood after 10 days of bloody hand-to-hand fighting. In total, the Americans suffered 1,811 men killed and 7,996 men wounded. German casualties were heavy but exact figures were unknown, although 1,600 German soldiers were taken prisoner.{{Cite book|title=The United States Army in a Global Era, 1917–2003|series=American Military History. Volume Two|publisher=Center of Military History, United States Army|location=Washington, D.C.|year=2005|editor1-last=Stewart|editor1-first=Richard W.|url=http://www.history.army.mil/books/AMH-V2/AMH%20V2/Chapter1.htm|page=32|access-date=2018-04-29|archive-date=2011-04-14|archive-url=https://web.archive.org/web/20110414195728/http://www.history.army.mil/books/amh-v2/amh%20v2/Chapter1.htm|url-status=dead}}
• Australian passenger ship {{SS|Wimmera||2}} struck a mine and sank in the Pacific Ocean off the coast of New Zealand, with the loss of 26 passengers and crew.{{cite web |url=http://www.naval-history.net/WW1LossesBrMS1918.htm |title= British Merchant Ships Lost To Enemy Action Part 3 of 3 – September 1917–November 1918 in date order |publisher=Naval History |access-date=26 January 2013}}
• German submarine {{SMU|UC-11||6}} struck a mine and sank in the Strait of Dover with the loss of all but one of her 19 crew.{{cite web |url=http://uboat.net/wwi/boats/index.html?boat=UC+11 |title=UC 11 |publisher=Uboat.net |access-date=26 September 2012}}
• Azerbaijan established its own armed forces, with Samad bey Mehmandarov as first Minister of Defense.[http://en.apa.az/print.php?id=104326 Azerbaijani Army marks 91 years] {{webarchive |url=https://web.archive.org/web/20120225202625/http://en.apa.az/print.php?id=104326 |date=25 February 2012 }}[http://www.today.az/news/politics/53397.html Today.Az – Azerbaijan marks Day of Armed Forces]
• The Cherepovets Governorate was established by the Soviet Russia for the city of Cherepovets, and remained active until 1927.{{cite web| url=http://www.rusarchives.ru/guide/voanpi/126sia.shtml|script-title=ru:Справка об изменениях административно-территориального устройства и сети партийных и комсомольских органов на территории Вологодской области (1917–1991)|publisher=Архивы России|language=ru|access-date=29 May 2011| url-status=dead|archive-url=https://web.archive.org/web/20110917021817/http://www.rusarchives.ru/guide/voanpi/126sia.shtml|archive-date=17 September 2011}}
• American flying ace Field Eugene Kindley scored the first of his 12 victories, shooting down the Pfalz fighter of Jagdstaffel 5 commanding officer Wilhelm Lehmann over Albert, France while flying on missions with Royal Air Force's No. 65 Squadron.{{cite book|last1=Franks|first1=Norman|last2=Dempsey|first2=Harry|title=American Aces of World War I|date=2001|publisher=Osprey Publishing|isbn=1-84176-375-6|page=50}}
• Born:
• Ellen Liiger, Estonian actress, known for film roles including the film adaptation of Karge meri; in Tallinn, Estonia (d. 1987){{citation needed|date=March 2025}}
• Roger Voisin, French-American classical musician, trumpeter for the Boston Symphony Orchestra, and noted for recordings with composers Paul Hindemith, Leroy Anderson and Alexander Arutiunian; in Angers, France (d. 2008){{citation needed|date=March 2025}}
• Rama Raghoba Rane, Indian army officer, noted commander during the Indo-Pakistani War, recipient of the Param Vir Chakra; in Karnataka, British India (present-day India) (d. 1994){{citation needed|date=March 2025}}
• Died:
• Kyrion, 62, Georgian religious leader, first Catholicos-Patriarch of All Georgia; assassinated (b. 1855){{citation needed|date=March 2025}}
• Peter Rosegger, 74, Austrian poet, known for poetry collection such as Zither und Hackbrett, three-time nominee for the Nobel Prize in Literature (b. 1843){{citation needed|date=March 2025}}

File:"HM Hospital Ship, Llandovery Castle".png]]

• Battle of Goychay – The Islamic Army of the Caucasus under command of Nuri Killigil defended the city of Goychay, Azerbaijan from the 11th Red Army.{{cite book| author=Süleymanov| title=Qafqaz İslam Ordusu və Azərbaycan| publisher=Hərbi nəşriyyat| location=Baku| year=1999| page=190}}
• Canadian hospital ship {{HMHS|Llandovery Castle}} was torpedoed and sunk in the Atlantic Ocean by German submarine {{SMU|U-86||6}} with the loss of 234 of the 258 people on board, making it the deadliest naval disaster in Canadian history.{{cite book |first=M. Stuart |last=Hunt |title=Nova Scotia's part in the Great War |publisher=The Nova Scotia Veteran Publishing Co. Ltd. |location=Halifax, Nova Scotia |year=1920 |pages=409–410 |url=https://archive.org/stream/novascotia00huntuoft#page/408/mode/2up |access-date=20 January 2014}}
• Axeman of New Orleans – Louis Besumer and his mistress Harriet Lowe were attacked in his New Orleans home with an axe that Besumer owned. Besumer survived the attack but the resulting investigation led to him becoming a suspect in the case. He served a nine-month sentence before a new trial acquitted him. The attack was similar to a previous murder involving an axe as a weapon and became connected to a series of subsequent murders in New Orleans.{{cite book|first=Hélèna|last=Katz|title=Cold Cases: Famous Unsolved Mysteries, Crimes, and Disappearances in America|publisher=ABC-CLIO|location=Santa Barbara, CA| isbn=9780313376924| year=2010| page=56}}
• The Royal Navy established the Gunnery and Torpedo Division.{{cite book| last1=Marder| first1=Arthur J.| title=From the Dreadnought to Scapa Flow: Volume V Victory and Aftermath January 1918–June 1919| date=Jun 13, 2014| publisher=Seaforth Publishing| isbn=9781848322035| page=8| url=https://books.google.com/books?id=eAFtBQAAQBAJ&q=Gunnery+and+Torpedo+Division+June+1918&pg=PA8| language=en}}
• Born:
• Adolph Kiefer, American swimmer and businessman, gold medalist at the 1936 Summer Olympics, founder of aquatics equipment company Adolph Kiefer & Associates, Inc.; in Chicago, United States (d. 2017){{citation needed|date=March 2025}}
• Edgar Kain, New Zealand air force officer, recipient of the Distinguished Flying Cross for action during the Battle of France; in Hastings, New Zealand (d. 1940, killed in action){{citation needed|date=March 2025}}
• Died: Joséphin Péladan, 60, French occultist, promoter of Catholic occultism, founder of the Salon de la Rose + Croix (b. 1858){{citation needed|date=March 2025}}

• Born: William Whitelaw, British politician, cabinet minister for the Edward Heath and Margaret Thatcher administrations; in Nairn, Scotland (d. 1999){{citation needed|date=March 2025}}
• Died:
• Albert Henry Munsell, 60, American inventor, creator of the Munsell color system (b. 1858){{citation needed|date=March 2025}}
• Lizzie Halliday, 58–59, Irish-American serial killer, first woman to be sentenced to be executed by electric chair for murder (sentence was commuted) (b. 1859){{citation needed|date=March 2025}}

• The United States Army Air Service established the 2nd Pursuit Group at the Toul-Croix de Metz Airfield in France using pilots from the 13th Aero Squadron.Series "E", Volume 9, History of the 11th–13th Aero Squadrons. Gorrell's History of the American Expeditionary Forces Air Service, 1917–1919, National Archives, Washington, D.C.
• The Massachusetts Bay Transportation Authority opened the Andrew station for the Red Line in Boston.{{cite web |url=http://www.transithistory.org/roster/MBTARouteHistory.pdf|title=Changes to Transit Service in the MBTA district |last=Belcher |first=Jonathan |date=22 March 2014 |publisher=NETransit |access-date=22 December 2014}}
• Bronx International Exposition of Science, Arts and Industries opened in New York City.{{Cite news|url=https://www.nytimes.com/1918/06/30/archives/crowds-see-opening-of-trade-exposition-police-commissioner-enright.html|title=Crowds See Opening of Trade Exposition; Police Commissioner Enright Receives Keys for City at Formal Opening. Permant Show Planned Borough President Bruckner Thanks Promoters for Choosing Site in the Bronx.|date=June 30, 1918|work=The New York Times|access-date=October 2, 2019|issn=0362-4331}}
• Born: Francis W. Nye, American air force officer, commander of the 28th Bomb Wing, Fairchild Air Force Base, and Sandia Base during the 1960s, two-time recipient of the Legion of Merit and Distinguished Flying Cross; in Barton, Vermont, United States (d. 2019){{citation needed|date=March 2025}}
• Died:
• John Ames Mitchell, 73, American publisher, co-founder of Life magazine (b. 1845){{citation needed|date=March 2025}}
• Tomás Claudio, 26, Filipino soldier, first Filipino soldier to serve and die in an international conflict; killed in action near Château-Thierry, France (b. 1892){{citation needed|date=March 2025}}

• Battle of Goychay – The Islamic Army of the Caucasus defeated the 11th Red Army at Goychay, Azerbaijan, allowing them to occupy lands between Goychay and Shamakhi.Süleymanov 1999, p. 190
• The first meeting between the Zionist leader Chaim Weizmann and Arab Revolt leader Prince Faisal took place at Faisal's headquarters in Aqaba in an attempt to establish favorable relations between Arabs and Jews in the Middle East.C.D. Smith, 2001, Palestine and the Arab-Israeli Conflict, 4th ed., {{ISBN|0-312-20828-6}}, p. 80

{{Reflist}}

{{Events by month links}}

1918

*1918-06