Flag Officer - United States

United States

In 1857 Congress created the title of "flag officer" as an actual rank of the Navy. The rank of flag officer was bestowed on senior navy captains who were assigned to lead a squadron of vessels in addition to command of their own ship. During the American Civil War, the Confederate States Navy also used the term. The 19th-century rank of "flag officer" was considered strictly temporary and became obsolete upon the creation and widespread usage of the equivalent naval rank of commodore; however, the term is still in use today to denote a category of naval officers equivalent to general officers.In 1862 Congress authorized American use of the title "admiral".

In the U.S. Army, Air Force, and Marine Corps, the term "flag officer" generally is applied to all general officers authorized to fly their own command flags—i.e., Brigadier General, or rank O-7, and above. However, as a matter of law, Title 10 of the United States Code makes a distinction between general officers and flag officers. Non-naval officers usually fly their flags from their headquarters, vessels, or vehicles, typically only for the most senior officer present. In the United States all flag and general officers must be nominated by the President and confirmed by the Senate; each subsequent promotion requires renomination and re-approval.