This Day In History Sep 13, 1814 Key pens Star-Spangled Banner On this day in 1814, Francis Scott Key pens a poem which is later set to music and in 1931 becomes America's national anthem, "The Star-Spangled Banner." The poem, originally titled "The Defence of Fort McHenry," was written after Key witnessed the Maryland fort being bombarded by the British during the War of 1812. Key was inspired by the sight of a lone U.S. flag still flying over Fort McHenry at daybreak, as reflected in the now-famous words of the "Star-Spangled Banner": "And the rocket's red glare, the bombs bursting in air, Gave proof through the night that our flag was still there." Francis Scott Key was born on August 1, 1779, at Terra Rubra, his family's estate in Frederick County (now Carroll County), Maryland. He became a successful lawyer in Maryland and Washington, D.C., and was later appointed U.S. attorney for the District of Columbia. On June 18, 1812, America declared war on Great Britain after a series of trade disagreements. In August 1814, British troops invaded Washington, D.C., and burned the White House, Capitol Building and Library of Congress. Their next target was Baltimore. After one of Key's friends, Dr. William Beanes, was taken prisoner by the British, Key went to Baltimore, located the ship where Beanes was being held and negotiated his release. However, Key and Beanes weren't allowed to leave until after the British bombardment of Fort McHenry. Key watched the bombing campaign unfold from aboard a ship located about eight miles away. After a day, the British were unable to destroy the fort and gave up. Key was relieved to see the American flag still flying over Fort McHenry and quickly penned a few lines in tribute to what he had witnessed. The poem was printed in newspapers and eventually set to the music of a popular English drinking tune called "To Anacreon in Heaven" by composer John Stafford Smith. People began referring to the song as "The Star-Spangled Banner" and in 1916 President Woodrow Wilson announced that it should be played at all official events. It was adopted as the national anthem on March 3, 1931. Francis Scott Key died of pleurisy on January 11, 1843. Today, the flag that flew over Fort McHenry in 1914 is housed at the Smithsonian Institution’s Museum of American History in Washington, D.C.