Pictured: Original 1814 sheet music (Carr edition) (public domain) · source
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Adopted by the US Navy in 1889 and all Armed Forces by 1917, but not made the official national anthem by Act of Congress (signed by President Hoover) until March 3, 1931.
The same melody was already widely used for American patriotic and political songs before Key's lyrics — including "Adams and Liberty."
Alongside "Yankee Doodle" — represented here via Cohan's "The Yankee Doodle Boy" — "Hail Columbia," and "Columbia, The Gem of the Ocean," it was one of several "national airs" used during the Civil War era, before any held official status.
Every source cited on this page — 5 in total