Marine Detachment

The Continental Congress established a Marine Corps of two battalions on 10 November 1775.{{cite web |url=https://www.britannica.com/topic/The-United-States-Marine-Corps |title=The United States Marine Corps |publisher=Encyclopædia Britannica, Inc. |accessdate=15 September 2023 }} Marines were detached from these battalions to serve aboard individual warships. Although these battalions were temporarily disbanded following the American Revolutionary War, the United States Marine Corps was created on 11 July 1798 to serve under the United States Secretary of the Navy.{{cite web |url=https://www.military.com/military-appreciation-month/origins-of-marine-corps-day.html |title=The Origins of the Marine Corps |publisher=Military.com |accessdate=15 September 2023 }} The 1834 Act for the Better Organization of the United States Marine Corps clarified the Marines chain of command through the United States Navy.{{cite web |url=https://www.marines.mil/News/Article/496642/war-of-1812-undaunted-legacy-memorialized/ |title=War of 1812 undaunted legacy memorialized |last=Boling |first=Justin M. |publisher=United States Marine Corps |accessdate=15 September 2023 }} Marines served aboard sailing ships as a small amphibious force able to capture and hold minor port facilities as required for protection of American interests. Marine sharpshooters were often stationed in the rigging during ship-to-ship combat to fire at officers and helmsmen aboard enemy warships. Marines often operated naval artillery during general quarters when the distances of gunnery engagements exceeded the range of small arms.{{cite book |last=Mayo |first=Claude Banks |title =Your Navy |publisher =Parker & Baird Company |date =1939 |location = Los Angeles |pages =311-317}}

As modern Navy tactics evolved away from traditional ship-to-ship combat to fighting over the horizon threats with guided missiles and computer controlled weapons systems, the shipboard responsibilities requiring an independent Marine Detachment aboard ships became more of an anachronism better suited to be absorbed by Navy Master-at-arms.

The individual seaborne landing parties became Fleet Anti-terrorism Security Teams (FAST), able to rapidly deploy where and as needed instead of scattered across the fleet. By 1998, only 11 officers and 275 enlisted Marines remained assigned to individual Marine Detachments when ALMARS 24/98 announced all Marine ships' detachments were to be disestablished. USMC 1stLt Grant Goodrich would be the last commander of a MarDet when he stood down his unit aboard {{USS|George Washington|CVN-73}} on 1 May 1998, at a ceremony following their return home from their deployment.{{cite web |last1=Krulak |first1=Charles C. |title=ALMAR 024/98 |url=https://www.marines.mil/News/Messages/Messages-Display/Article/886701/marine-corps-security-forces/ |website=United States Marine Corps |publisher=Commandant of the Marine Corps |access-date=12 September 2022 |date=28 January 1998}}

Each shipboard MarDet included a Marine Corps commanding officer who reported to the Commandant of the Marine Corps through the ship's captain. When more than one Marine officer was assigned to a ship, United States Navy Regulations required one Marine officer to be aboard ship at all times unless excused by the ship's captain. Marine officers below the rank of major sometimes served as officer of the deck.

The State Department relied upon the Navy's ability to transport shipboard Marine detachments overseas for rescue, escort, and defense of United States diplomatic missions before air travel was available. Since 1948, detachments of Marine Security Guards have been stationed at United States embassies and consulates around the world.{{cite web |url=https://www.state.gov/marine-security-guards/ |title=Marine Security Guards |publisher=United States Department of State |accessdate=15 September 2023 }} There have been a few mounted detachments. An executive flight detachment was created in 1958 to transport the President of the United States and other key government officials.{{cite web |url=https://jfk.artifacts.archives.gov/people/3301/us-army-executive-flight-detachment |title=US Army Executive Flight Detachment |publisher=National Archives and Records Administration |accessdate=15 September 2023 }}

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Category:Military units and formations of the United States Marine Corps