Turkey in NATO

Turkey sought NATO membership to secure guarantees against potential invasion by the Soviet Union, which made several overtures towards control of the Straits of the Dardanelles.{{Cite journal |last=Aydin |first=Mustafa |date=2000 |title=Determinants of Turkish Foreign Policy: Changing Patterns and Conjunctures during the Cold War |url=https://www.jstor.org/stable/4284054 |journal=Middle Eastern Studies |volume=36 |issue=1 |pages=103–139 |doi=10.1080/00263200008701300 |jstor=4284054 |s2cid=153780513 |issn=0026-3206 |url-access=subscription }} In March 1945, the Soviets terminated the Treaty of Friendship and Non Aggression to which the Soviet Union and Turkey had agreed in 1925.Aydin, Mustafa (2000).p.107 In June 1945, the Soviets demanded the establishment of Soviet bases on the Straits in exchange for a reinstatement of this treaty. The Turkish President Ismet Inönu and the Speaker of the Parliament responded decisively, avowing Turkey's readiness to defend itself.

In 1948, Turkey began indicating its desire for NATO membership,{{Cite journal |last=Goren |first=Nilsu |date=2018 |title=The NATO/US-Turkey-Russia Strategic Triangle: Challenges Ahead |url=https://www.jstor.org/stable/resrep17001 |journal=Center for International & Security Studies |page=3 }} and throughout 1948 and 1949 American officials responded negatively towards Turkish requests for inclusion.{{Cite journal |last=P. Leffler |first=Melvyn |author-link=Melvyn P. Leffler |date=1 March 1985 |title=Strategy, Diplomacy, and the Cold War: The United States, Turkey, and NATO, 1945–1952 |url=https://academic.oup.com/jah/article/71/4/807/755479 |journal=The Journal of American History |volume=71 |issue=4 |pages=819 |doi=10.2307/1888505 |jstor=1888505 |via=University of Oxford|url-access=subscription }} In May 1950, during Ismet Inönü's presidency, Turkey made its first formal accession bid, which was denied by the NATO member states.{{Cite journal |last=Lippe |first=John M. Vander |date=2000 |title=Forgotten Brigade of the Forgotten War: Turkey's Participation in the Korean War |url=https://www.jstor.org/stable/4284053 |journal=Middle Eastern Studies |volume=36 |issue=1 |pages=95 |doi=10.1080/00263200008701299 |jstor=4284053 |s2cid=143895626 |issn=0026-3206|url-access=subscription }} In August the same year and just days after Turkey pledged a Turkish contingent for the Korean War, a second bid was made. After the Under Secretary of State Dean Acheson coordinated with France and the United Kingdom in September 1950, the NATO command invited both Greece and Turkey to present their plans for an eventual defense cooperation.{{Cite journal |last=Leffler |first=Melvyn P. |date=1985 |title=Strategy, Diplomacy, and the Cold War: The United States, Turkey, and NATO, 1945-1952 |url=https://www.jstor.org/stable/1888505 |journal=The Journal of American History |publisher=Oxford University Press |volume=71 |issue=4 |pages=820–821 |doi=10.2307/1888505 |jstor=1888505 |issn=0021-8723 |url-access=subscription }}{{Cite journal |last=Yeşi̇lbursa |first=Behçet K. |date=1999 |title=Turkey's Participation in the Middle East Command and Its Admission to NATO, 1950-52 |url=https://www.jstor.org/stable/4284040 |journal=Middle Eastern Studies |volume=35 |issue=4 |pages=77 |doi=10.1080/00263209908701287 |jstor=4284040 |issn=0026-3206|url-access=subscription }} Turkey acceded, but expressed disappointment that full membership within NATO was not considered.Leffler, Melvyn P. (1985).pp. 821–822 When US bureaucrat George McGhee visited Turkey in February 1951, Turkish president Celal Bayar emphasized that Turkey expected a full membership, particularly after sending troops to the Korean War. Turkey wanted a security guarantee in case a conflict with the Soviet Union arose.Lippe, John M. Vander (2000),pp.95–96 After further evaluations taken at the NATO headquarters and by officials of the Central Intelligence Agency (CIA) and the US Military, it was decided in May 1951 to offer Turkey full membership.Leffler, Melvyn P. (1985).pp.822 – 824 The potential role Turkey could play in a war against the Soviet Union was seen as important for NATO. Throughout 1951, the US worked on convincing its fellow NATO allies of the advantages of Turkey's and Greece's membership within the alliance. In February 1952, Bayar signed the document confirming its accession.{{Cite web |last=NATO |title=Turkey and NATO – 1952 |url=https://www.nato.int/cps/en/natohq/declassified_191048.htm |access-date=2022-05-31 |website=NATO |language=en}}

File:Incirlik Air Base overhead 1987.jpg in 1987]]

Incirlik air base has been a military air base since the 1950s and since then has gained more and more importance.{{Cite web |title=Incirlik Air Base: Shared Military asset and political bargaining chip. |url=https://www.turkheritage.org/ |access-date=2022-05-31 |website=www.turkheritage.org |language=en}} It was built between 1951 and 1952 by US military contractors and has been in operation since 1955.{{Cite web |last=Micallef |first=Joseph V. |date=2019-11-14 |title=Is It Time to Withdraw US Nuclear Weapons from Incirlik? |url=https://www.military.com/daily-news/2019/11/14/it-time-withdraw-us-nuclear-weapons-incirlik.html |access-date=2022-05-31 |website=Military.com |language=en}} In the base are stationed an estimated 50 nuclear weapons.Goren, Nilsu (2018), p.5 The Konya airbase was established in 1983 and hosts AWACS surveillance jets for NATO.{{Cite web |title=FOB Konya |url=https://awacs.nato.int/organisation/forward-operating-bases--location/fob-konya.aspx |access-date=2022-05-31 |website=NATO |language=en}} Since December 2012, the headquarters of NATO Land Forces has been located in Buca near İzmir on the Aegean Sea.{{Cite web |date=2013 |title=NATO Air Command bids farewell to Izmir |url=https://www.aa.com.tr/en/turkey/nato-air-command-bids-farewell-to-izmir/243756 |access-date=2022-05-31 |website=Anadolu Agency}}{{Cite web |title=NATO establishes Allied Land Command in Izmir, Turkey |url=https://www.dvidshub.net/news/98571/nato-establishes-allied-land-command-izmir-turkey |access-date=2022-05-31 |website=DVIDS |language=en}} The Allied Air Command for Southern Europe was also based in Buca between 2004 and 2013. Since 2012, the Kürecik radar station located about 500 km from Iran, is in service as part of the NATO missile defence system.{{Cite journal |last1=TAĞMA |first1=Halit Mustafa Emin |last2=MÜFTÜLER-BAÇ |first2=Meltem |last3=UZUN |first3=Ezgi |date=2013 |title=The Path to an Entrenching Alliance: Utilitarianism and Historical Institutionalism in Committing to NATO's Missile Defense System |url=https://www.jstor.org/stable/43926509 |journal=Uluslararası İlişkiler / International Relations |volume=9 |issue=36 |pages=76–77 |jstor=43926509 |issn=1304-7310}}

The first military deployment in view to NATO was in the Korean War from July 1950 onwards.Lippe, John M. Vander (2000),p.97 Turkey deployed 4500 soldiers to the United Nations Command in support of the South Koreans. The Turkish soldiers left a good impression with their American allies, who awarded them with the Distinguished Unit Citation. While Turkey was not a member of NATO at the time, the troops were pledged in view of a potential NATO membership.

Between 2001 and 2021, Turkey sent troops to NATO's involvement in Afghanistan.{{Cite web |title=Turkey's long involvement in NATO mission in Afghanistan |url=https://www.aa.com.tr/en/asia-pacific/turkey-s-long-involvement-in-nato-mission-in-afghanistan/2279062 |access-date=2022-05-31 |website=Anadolu Agency}} First into the International Security Assistance Force (ISAF) until 2014 and then also to the Resolute Support Mission between 2020 and 2021. After an agreement between the United States and the Taliban for a withdrawal of US and NATO troops, they left from May 2021 onwards.{{Cite web |title=US and NATO leave Afghanistan: What next? |url=https://www.europarl.europa.eu/RegData/etudes/ATAG/2021/696169/EPRS_ATA(2021)696169_EN.pdf |website=European Parliament}}

After the Syrian Civil War erupted, Turkey was provided with NATO assistance consisting of a Patriot air defense system in December 2012.{{Cite web |last=Lindenstrauss |first=Gallia |date=11 December 2012 |title=Between NATO and Russia: The Pieces of Turkey's Puzzle |url=https://www.inss.org.il/publication/between-nato-and-russia-the-pieces-of-turkeys-puzzle/ |access-date=2022-05-31 |website=Institute for National Security Studies}} The US sent two batteries and 400 soldiers while Germany and the Netherlands pledged modern weaponry for the system, meant against potential missiles strikes from Syria.{{Cite web |date=2012-12-14 |title=US to send Turkey 400 troops and Patriot missiles |url=https://www.france24.com/en/20121214-usa-send-turkey-400-troops-patriot-missiles-assad-syria-defence |access-date=2022-05-31 |website=France 24 |language=en}} Turkey also demanded a no-fly zone in Syria, but this was not considered by NATO.{{Cite news |last=Hogg |first=Jonny |date=2014-11-26 |title=Syria 'no-fly zone' not being considered: NATO general |language=en |work=Reuters |url=https://www.reuters.com/article/us-syria-crisis-nato-idUSKCN0JA10120141126 |access-date=2022-05-31}} The Netherlands withdrew their support in January 2015 and Germany and the United States the same year in August.{{Cite web |last=Gürcan |first=Metin |date=August 2015 |title=US plays politics with Patriot missile removal|publisher=Al-Monitor|url=https://www.al-monitor.com/originals/2015/08/turkey-germany-patriots-controversial-arrival-controversial.html |access-date=2022-05-31 |website=Al-Monitor |language=en}}

After terrorist attacks against the Twin Towers on 11 September 2001, NATO launched Operation Active Endeavour in the Mediterranean Sea to monitor the maritime traffic. The Turkish navy participated in this operation.{{Cite web |last=NATO |title=Operation Active Endeavour (2001-2016) |url=https://www.nato.int/cps/en/natohq/topics_7932.htm |access-date=2022-06-01 |website=NATO |language=en}}

The formation of the Balkan Pact (1953) in 1954 by Turkey, Greece and Yugoslavia was initially objected to by Italy, who demanded that NATO be consulted, before other NATO members make new military agreements with Non-NATO countries.{{Cite journal |last=Heinemann |first=Winfried |date=1997 |title=The West and Yugoslavia in the 1950s |url=https://www.jstor.org/stable/26304413 |journal=Army History |issue=40 |pages=13–15 |jstor=26304413 |issn=1546-5330 }} But the other members did not see this as necessary and the agreement was signed in Bled, in present-day Slovenia in August 1954.

{{see also|Greece–Turkey relations}}

Greece and Turkey entered the coalition together in 1952.{{Cite web |last=Chrysopoulos |first=Philip |date=2022-02-18 |title=Greece Joined NATO 70 Years Ago, on February 18, 1952 |url=https://greekreporter.com/2022/02/18/greece-nato-joined-70-years-ago/ |access-date=2022-05-31 |website=Greek Reporter |language=en-US}} Over the Cyprus dispute with Turkey, Greece's involvement in NATO diminished gradually, as in 1964 Greece withdrew troops,{{Cite news |date=1964-08-18 |title=Greece Withdrawing Units From NATO to Aid Cyprus |language=en-US |work=The New York Times |url=https://www.nytimes.com/1964/08/18/archives/greece-withdrawing-units-from-nato-to-aid-cyprus.html |access-date=2022-05-31 |issn=0362-4331}} and in 1974, the year of the Turkish invasion of Cyprus, it also withdrew from the military wing of NATO deeming it not worthy to exist if it could not find a solution to this conflict. In 1980 Greece returned. Turkey later saw allowing this to happen as a mistake, as Erdogan accused Greece of giving refuge to "terrorists".{{Cite news |last=Murphy |first=Matt |date=2022-05-24 |title=Erdogan blanks Greek prime minister over US remarks |language=en-GB |work=BBC News |url=https://www.bbc.com/news/world-europe-61562305 |access-date=2022-05-31}}

{{see also|Turkey–United States relations}}

The United States is an important NATO ally with over a thousand military personnel stationed in Turkey.{{Cite journal |last=Bölme |first=Selin M. |date=2007 |title=The Politics of Incirlik Air Base |url=https://www.jstor.org/stable/26328896 |journal=Insight Turkey |volume=9 |issue=3 |pages=82–91 |jstor=26328896 |issn=1302-177X }} The North Atlantic Treaty Regarding the Status of Their Forces (SOFA) signed in 1952 and 1954 also granted NATO the right to build facilities in Turkey such as the Incirlik air base. As after the Turkish invasion of Cyprus in 1974, the US imposed a weapons embargo because Turkey used military equipment produced in the US, and Turkey expelled all US military personnel except the ones involved in NATO activities.{{Cite web |title=Izmir Air Force Base in Izmir, Turkey {{!}} MilitaryBases.com |url=https://militarybases.com/overseas/turkey/izmir/ |access-date=2022-05-31 |website=Military Bases |language=en-US}} In 1978, the US lifted the weapon embargo.{{Cite web |last=Alhas |first=Ali Murat |date=29 December 2019 |title=Despite issues, Turkish military bases still key for US |url=https://www.aa.com.tr/en/americas/despite-issues-turkish-military-bases-still-key-for-us/1686726 |access-date=2022-06-05 |website=Anadolu Agency}} In 2017 Turkey objected to weapons deliveries by the US to People's Defense Units (YPG) because it would violate NATO rules.{{Cite web |title=Turkey to US: Providing arms to YPG violation of NATO rules |url=https://www.hurriyetdailynews.com/turkey-to-us-providing-arms-to-ypg-violation-of-nato-rules-114724 |access-date=2022-05-31 |website=Hürriyet Daily News |language=en}}

{{see also|France–Turkey relations}}

As in 2019 the United States decided to withdraw from northeast Syria and make way for Turkey to invade the area despite several NATO member states being opposed to a military operation, French President Emmanuel Macron called NATO brain-dead as he would have preferred better cooperation between NATO allies.{{Cite news |last1=Keohane |first1=David |last2=Pitel |first2=Laura |date=2019-11-29 |title=Turkey's Erdogan calls Macron 'brain-dead' over Nato comments |work=Financial Times |url=https://www.ft.com/content/3c9914b0-12c6-11ea-a7e6-62bf4f9e548a |access-date=2022-05-31}} The Turkish military operation was directed against the Peoples Defense Units (YPG) involved in the fight against the Islamic State (IS). Macron alleged that Turkey should not expect support from NATO member states if the Turkish military operation was not halted. A diplomatic spat followed, with Recep Tayyip Erdogan asking Macron if he was brain-dead himself and France summoning the Turkish ambassador. The invasion ended after the Vice President of the United States came to an agreement with Turkey for a ceasefire in order to keep US troops involved in the fight against the Islamic state in safety.{{Cite web |date=2022-05-24 |title=US warns Turkey against new Syria offensive |url=https://www.france24.com/en/live-news/20220524-us-warns-turkey-against-new-syria-offensive |access-date=2022-05-31 |website=France 24 |language=en}} In May 2022, when Turkey discussed the possibility of an additional incursion, the United States again warned against such an undertaking.

NATO established a plan to defend the Baltic states after the Russian annexation of the Crimea in 2014.{{Cite news |date=2020-07-02 |title=NATO puts defence plan for Poland, Baltics into action, officials say |language=en |work=Reuters |url=https://www.reuters.com/article/us-nato-baltics-turkey-idUSKBN24320B |access-date=2022-05-31}} The plan was dubbed Eagle Defender, but was not implemented at the time due to Turkish objections. Turkey wanted NATO officials to classify the People's Defense Units (YPG) as a terrorist organization in exchange for its approval for the plan. In July 2020, Turkey withdrew its objection, and Eagle Defender was able to come into practice.

{{see also|Finland–NATO relations|Sweden–NATO relations|Enlargement of NATO#Finland and Sweden|NATO open door policy}}

When Finland and Sweden decided to apply to join NATO in May 2022, Turkey was the only NATO member to oppose their membership, due to their concerns that the countries were harboring of Kurdistan Workers' Party (PKK), Democratic Union Party (Syria) (PYD), People's Defense Units (YPG) and of Gülen movement members that Turkey sees as terrorists.{{Cite news |date=2022-05-16 |title=Turkey 'will not say yes' to Finland and Sweden's bid for NATO membership |language=en |work=Le Monde |url=https://www.lemonde.fr/en/international/article/2022/05/16/turkey-will-not-say-yes-to-finland-and-sweden-s-bid-for-nato-membership_5983746_4.html |access-date=2022-05-31}}{{Cite web |last=Suny |first=Ronald |author-link=Ronald Grigor Suny |title=Why Turkey isn't on board with Finland, Sweden joining NATO – and why that matters |url=http://theconversation.com/why-turkey-isnt-on-board-with-finland-sweden-joining-nato-and-why-that-matters-183277 |access-date=2022-05-31 |website=The Conversation |language=en}} On 18 May 2022, Turkey blocked the start of accession negotiations for Finland and Sweden to NATO.{{cite web |last=Rauhala |first=Emily |date=2022-05-18 |title=Turkey blocks start of NATO talks on Finland's and Sweden's applications |url=https://www.washingtonpost.com/world/2022/05/18/finland-sweden-nato-apply/ |archive-url=https://web.archive.org/web/20240428232936/https://www.washingtonpost.com/world/2022/05/18/finland-sweden-nato-apply/ |archive-date=2024-04-28 |newspaper=The Washington Post |access-date=2024-04-28}} Turkish Foreign Minister Mevlüt Çavuşoğlu demanded that Finland and Sweden adapt their laws, if this had to be done in order to address Turkish security concerns.{{Cite news |last=Güsten |first=Susanne |date=2022-05-28 |title=So erpresst die Türkei den Westen im Nato-Streit |language=de-DE |work=Der Tagesspiegel Online |url=https://www.tagesspiegel.de/politik/zustimmung-nur-gegen-auslieferungen-so-erpresst-die-tuerkei-den-westen-im-nato-streit/28380340.html |access-date=2022-06-19 |issn=1865-2263}} Diplomats of the two Nordic countries arrived in Ankara to negotiate, but the conclusions were not to the satisfaction of Erdogan, who was offended by the fact that the Syrian Kurdish politician Salih Muslim was seen on Sveriges Television the same day Nordic diplomats were in Ankara to negotiate.{{Cite web |date=2022-05-29 |title=Turkey's Erdogan still against Finnish, Swedish NATO bids |url=https://apnews.com/article/politics-middle-east-syria-turkey-sweden-8dbc1922ad547a6baf45a2045e6e7a35 |access-date=2022-05-31 |website=AP NEWS |language=en}} Nationalist Movement Party (MHP) leader Devlet Bahçeli suggested that a scenario in which Turkey would leave NATO should be considered an option.{{Cite web |title=Leaving NATO should be on agenda: MHP leader – Turkey News |url=https://www.hurriyetdailynews.com/leaving-nato-should-be-on-agenda-mhp-leader-174038 |access-date=2022-05-29 |website=Hürriyet Daily News |language=en}} In late May 2022, opposition leader Kemal Kiliçdaroglu argued that if the accession row persisted, AKP and MHP would decide to close the Incirlik Airbase, the Republican People's Party (CHP) would also support it.{{Cite web |date=27 May 2022 |title=Main opposition urges gov't to close İncirlik base over NATO row |url=https://ahvalnews.com/kemal-kilicdaroglu/main-opposition-urges-govt-close-incirlik-base-over-nato-row |access-date=29 May 2022 |website=Ahval}} On 28 June 2022, during the NATO summit in Madrid, a tripartite memorandum was signed between Finland, Sweden and Turkey, paving the way for accession negotiations with Finland and Sweden to join NATO.{{Cite news |date=2022-06-28 |title=Finnish President Niinisto says Turkey has agreed to back Finnish and Swedish NATO membership |language=en |work=Reuters |url=https://www.reuters.com/world/europe/finnish-president-niinisto-says-turkey-has-agreed-back-finnish-swedish-nato-2022-06-28/ |access-date=2022-12-27}} On the same day, Turkey agreed to support the accession bids of Finland and Sweden.{{cite web |last=Wright |first=George |date=2022-06-29 |title=Turkey supports Finland and Sweden Nato bid |url=https://www.bbc.com/news/world-europe-61971858 |newspaper=BBC News}}

On 30 June 2022, Turkish President Recep Tayyip Erdoğan announced that the accession protocols of Finland and Sweden would not be approved in the Turkish Grand National Assembly if the necessary conditions of the tripartite memorandum are not met.{{cite web |date=2022-06-30 |title=Sözlerini tutmazlarsa NATO üyeliği parlamentodan geçmez |url=https://www.dw.com/tr/erdo%C4%9Fan-i%CC%87sve%C3%A7-ve-finlandiya-g%C3%B6revlerini-yerine-getirmezse-nato-%C3%BCyeli%C4%9Fi-parlamentodan-ge%C3%A7mez/a-62319165 |url-status=live |archive-url=https://web.archive.org/web/20221130152724/https://www.dw.com/tr/erdo%C4%9Fan-i%CC%87sve%C3%A7-ve-finlandiya-g%C3%B6revlerini-yerine-getirmezse-nato-%C3%BCyeli%C4%9Fi-parlamentodan-ge%C3%A7mez/a-62319165 |archive-date=30 November 2022 |access-date=30 November 2022 |website=DW Türkçe |publisher= |language=tr}} Finland eventually received Turkey's approval on the 30 March 2023, but Sweden did not.{{Cite web |last1=Bayer |first1=Lili |last2=Aksu |first2=Leyla |date=2023-03-30 |title=Finland cleared to join NATO following Turkish vote |url=https://www.politico.eu/article/finland-join-nato-memeber-turkey-parliament-vote/ |access-date=2023-04-17 |website=Politico|language=en}} On 1 April 2023, Erdoğan signed and approved the proposal containing Finland's accession protocol.{{cite news|url=https://yle.fi/a/74-20025375|title=Erdogan has signed ratification of Finland's Nato membership|website=Yle|date=1 April 2023 |access-date=4 April 2023 |archive-date=1 April 2023 |archive-url=https://web.archive.org/web/20230401205652/https://yle.fi/a/74-20025375 |url-status=live}} Just prior to the NATO summit in Vilnius in July 2023, Erdoğan linked Sweden's accession to NATO membership to Turkey's application for EU membership. Turkey had applied for EU membership in 1999, but talks made little progress since 2016.{{cite web |last1=Hayatsever |first1=Huseyin |last2=Toksabay |first2=Ece |date=2023-07-10 |title=Erdogan links Sweden's NATO membership to Turkey's EU accession |url=https://www.reuters.com/world/europe/erdogan-links-swedens-nato-membership-turkeys-eu-accession-2023-07-10/ |access-date=2023-07-10 |website=Reuters}}{{cite web |last1=Alam |first1=Hande Atay |last2=Edwards |first2=Christian |date=2023-07-10 |title=Erdogan links Sweden's NATO bid to Turkey joining the EU |url=https://www.cnn.com/2023/07/10/europe/erdogan-turkey-nato-eu-sweden-intl/index.html |access-date=2023-07-10 |website=CNN}} On 10 July 2023 Turkish President Erdogan agreed to support Sweden's NATO bid.{{Cite news |title=Turkey Agrees to Support Sweden's NATO Bid, Clearing Main Obstacle |url=https://www.nytimes.com/2023/07/10/world/europe/erdogan-turkey-sweden-nato.html |access-date=2023-07-18}} Kurdish political parties in Turkey, the Peoples' Democratic Party (HDP), abstained from voting on Finland's membership in March 2023, and the Peoples' Equality and Democracy Party (DEM) abstained and voted against Sweden's membership in January 2024.{{cite web |date=2023-03-31 |title=HDP, ilk kez bir askeri anlaşmaya 'hayır' demedi |url=https://www.gazeteduvar.com.tr/hdp-ilk-kez-bir-askeri-anlasmaya-hayir-demedi-haber-1610967 |website=Gazete Duvar |language=tr}}{{cite web |date=2024-01-25 |title=Turkey’s pro-Kurdish party opposed Sweden’s NATO membership, voted against it in parliament |url=https://nordicmonitor.com/2024/01/turkeys-pro-kurdish-party-dep-opposed-to-swedens-nato-membership-voted-against-it-in-parliament/ |website=Nordic Monitor |language=en}}

On 23 January 2024, the Turkish Parliament accepted Sweden's accession bid with a vote of 287 in favor, 55 against and 4 abstained.{{Cite news |date=2024-01-23 |title=Turkey parliament backs Sweden's Nato membership |url=https://www.bbc.com/news/world-europe-68076829 |archive-url=https://web.archive.org/web/20240123223547/https://www.bbc.com/news/world-europe-68076829 |archive-date=23 January 2024 |access-date=2024-01-23 |work=BBC News |language=en-GB}} On 25 January 2024, Erdoğan signed and approved the proposal containing Sweden's accession protocol.{{cite web|date=2024-01-25|url=https://www.ntv.com.tr/turkiye/son-dakika-haberi-cumhurbaskani-erdogan-isvecin-nato-uyeligikararini-onayladi,kjvWV5WQmkiTPnIig-d2PQ|title=Cumhurbaşkanı Erdoğan, İsveç'in NATO üyeliği kararını onayladı|publisher=ntv.com.tr|language=tr|access-date=6 February 2024|archive-date=6 February 2024|archive-url=https://web.archive.org/web/20240206113538/https://www.ntv.com.tr/amp/turkiye/son-dakika-haberi-cumhurbaskani-erdogan-isvecin-nato-uyeligikararini-onayladi,kjvWV5WQmkiTPnIig-d2PQ|url-status=live}}

NATO Secretary General Jens Stoltenberg met with Turkish President Recep Tayyip Erdoğan, Turkish Foreign Minister Mevlüt Çavuşoğlu and Turkish Defense Minister Hulusi Akar in Istanbul on 3–5 November 2022 to hold talks regarding the membership of Finland and Sweden.{{Cite web|title=NATO Secretary General visits Türkiye|url=https://www.nato.int/cps/en/natohq/news_208707.htm|website=nato.int |date=3 November 2022}} On 25 November 2024, NATO Secretary General Mark Rutte met with Turkish President Recep Tayyip Erdoğan, Turkish Foreign Minister Hakan Fidan and Turkish Defense Minister Yaşar Güler in Ankara.{{Cite web|title=Secretary General in Türkiye: Strong Turkish defence capabilities contribute to a strong NATO|url=https://www.nato.int/cps/en/natohq/news_230766.htm|website=nato.int |date=25 November 2024}}

Turkey's actions over the past decade have sparked significant controversy within NATO. Key points of contention include its purchase of Russian S-400 air defense systems,https://www.jpost.com/opinion/article-847383 sustained energy and economic ties with Russia and China, independent military operations in Syria and Iraq, and military threats against NATO members and allies. These actions have consistently caused friction and raised concerns among other NATO members and allies due to Turkey's violations of NATO's principles.{{Cite web |date=2024-07-08 |title=Turkey carves its own course in NATO |url=https://www.politico.eu/article/turkey-nato-russia-ukraine-turkish-defense-minister-yasar-guler/ |access-date=2024-07-29 |website=POLITICO |language=en-GB}}

In December 2020, the Trump administration imposed sanctions on Turkey due to its acquisition of the Russian S-400 missile system. This $2.5 billion deal, brokered in 2017 between Turkish President Recep Tayyip Erdoğan and Russian President Vladimir Putin, was viewed as a threat to NATO's security and the operational integrity of the F-35 program. Despite repeated US offers to sell the Patriot missile system instead, Turkey proceeded with the S-400 purchase, resulting in its removal from the F-35 program and the imposition of sanctions under the Countering America's Adversaries Through Sanctions Act. The sanctions targeted Turkey's Presidency of Defense Industries and its top officials, freezing assets and imposing visa restrictions.{{Cite web |last=Macias |first=Amanda |date=2020-12-14 |title=U.S. sanctions Turkey over purchase of Russian S-400 missile system |url=https://www.cnbc.com/2020/12/14/us-sanctions-turkey-over-russian-s400.html |access-date=2024-07-29 |website=CNBC |language=en}}

In December 2022, Erdoğan threatened to strike the Greek capital of Athens with ballistic missiles. In a speech, he revealed that Turkey had begun producing its own short-range ballistic missiles, which he claimed were "frightening the Greeks." Erdogan stated, "(The Greeks) say 'It can hit Athens.' Of course, it will. If you don't stay calm, if you try to buy things from the United States and other places (to arm) the islands, a country like Turkey ... has to do something." In response, Greek Foreign Minister Nikos Dendias condemned the threats, describing them as "unacceptable and universally condemnable" and likened Erdogan's behavior to "North Korean attitudes." Dendias emphasized that such actions should not be part of NATO.{{Cite web |date=2022-12-12 |title=Greek foreign minister slams Turkish leader's missile threat |url=https://apnews.com/article/greece-turkey-athens-recep-tayyip-erdogan-government-5bee76c2e7b2e1feaea3e2dddf54144c |access-date=2024-07-29 |website=AP News |language=en}}

In July 2024, Erdoğan threatened to invade Israel, stating that Turkey might intervene as it had previously done in Libya and Nagorno-Karabakh. Erdoğan's threats, which followed a series of anti-Israel comments made by him in the past, came during a speech praising Turkey's defense industry and amidst escalating tensions between Israel and Hezbollah.{{Cite web |date=2024-07-28 |title=Erdogan threatens Israel: 'Like we entered Karabakh and Libya – we will do the same to Israel' |url=https://www.jpost.com/breaking-news/article-812268 |access-date=2024-07-29 |website=The Jerusalem Post – JPost.com |language=en}}{{Cite news |date=2024-07-28 |title=Turkey's Erdogan Escalates Anti-Israel Rhetoric With Threat of Intervention |url=https://www.bloomberg.com/news/articles/2024-07-28/turkey-s-erdogan-escalates-anti-israel-rhetoric-with-threat-of-intervention |access-date=2024-07-29 |work=Bloomberg.com |language=en}}{{Cite web |date=2024-07-29 |title=Turkey threatens to 'enter' Israel to protect Palestinians |url=https://www.politico.eu/article/turkey-nato-tayyip-erdogan-threatens-enter-israel-help-palestinians/ |access-date=2024-07-29 |website=POLITICO |language=en-GB}} Dutch politician Geert Wilders condemned Erdoğan's statements and called for Turkey's removal from NATO.{{Cite news |last=Eichner |first=Itamar |date=2024-07-29 |title=Wilders: Turkey should be kicked out of NATO after threatening Israel with war |url=https://www.ynetnews.com/article/rypa7ivkc |access-date=2024-07-29 |work=Ynetnews |language=en}} Again in 2025, then Erdoğan called for Israel to be destroyed.https://www.algemeiner.com/2025/03/31/revealed-his-antisemitic-face-erdogans-call-destroy-israel-prompts-feud-top-israeli-diplomat/ Israel's Foreign Minister Gideon Sa'ar responded and said that “the dictator has revealed his antisemitic face.https://www.jns.org/may-allah-destroy-israel-erdogan-says-in-eid-al-fitr-prayer/

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