Francis Scott Key wrote the words to The Star-Spangled Banner on 14 September, 1814, during the British bombardment of Fort McHenry during the War of 1812.

President James Madison sent Key to attemt to secure the release of Maryland physician Dr. William Beanes, who had been captured after the burning of Washington DC for harassing British soldiers. The British agreed to release Beanes, but Key was detained overnight as the British were about to shell the fort which guarded the entrance to Baltimore harbor.

Key was held on one of the frigates participating in the attack during the night of 13-14 September, 1814. All through the night, he watched the bombardment and prayed that the fortress would not be captured.

In the morning, he was so delighted to see the American flag still flying over the fort that he began a poem to commemorate the occasion¹. Set to the old English song, To Anacreon in Heaven, Key's composition quickly became a popular patriotic songs. Both sides played the song during the American Civil War and the military adopted it as the 'unofficial' national anthem.

Though it contains four stanzas, only the first is usually sung as the National Anthem, in fact, 99 percent of Americans probably couldn't sing all four verses.

The Star-Spangled Banner was officially made the National Anthem by Congress in 1931 with a law signed by President Herbert Hoover.

The British never did capture Fort McHenry and it stands today as a part of the National Park Service and is the only park designated as both a national monument and a national shrine.