What event inspired francis scott key to write "the star-spangled banner"?

the war of 1812 when u.s. soldiers held up a huge american flag inspired francis scott key to write it. the sight of broad stripes and broad stars make him want to write the star spangled banner.

The War of 1812.

Explanation:

Francis Scott Key was inspired to write "The Star-Spangled Banner" by witnessing the British bombarding the Maryland fort during the War of 1812.   Key saw a lone U.S. flag still flying over Fort McHenry. As reflected in the lyrics of the anthem: "And the rocket’s red glare, the bombs bursting in air, Gave proof through the night that our flag was still there."

At first, it was conceived as a poem that was later published in newspapers and then set to the music of a popular English song called "To Anacreon in Heaven", composed by John Stafford Smith. After president Woodrow Wilson said it should be played at all official events in 1916, it was finally adopted as the national anthem on March 3, 1931.

straight down to hell mate

because of the war the westeners befriended japan and each other advance.