September 14

Francis Scott Key Pens Star-Spangled Banner

181419th CenturyCultureNorth Americahighexpanded detail

Francis Scott Key’s poem, written after he watched Fort McHenry withstand a British naval assault, captured a moment of American defiance that later became the national anthem.

Summary

During the War of 1812, British forces attacked Baltimore in September 1814 as part of their campaign against the young United States. American lawyer Francis Scott Key had boarded a British truce ship to negotiate the release of a prisoner and was detained overnight aboard the vessel while the Royal Navy bombarded Fort McHenry. On the night of September 13–14, he witnessed the fort withstand a fierce barrage of shells and rockets. At dawn on September 14, Key saw the American flag still flying over the fort, inspiring him to write a poem titled “Defence of Fort M’Henry” on the back of an envelope. The verses, later set to music, became the U.S. national anthem in 1931.

Context

The War of 1812 pitted the young United States against Great Britain over issues including maritime rights, trade restrictions, and British support for Native American resistance on the frontier. American forces achieved some successes on land and at sea but struggled to match British naval power overall. In August 1814, British troops landed in Maryland, marched on Washington, and burned key public buildings including the Capitol and White House before withdrawing.

What Happened

In early September 1814, as British forces prepared to attack Baltimore, American lawyer Francis Scott Key and U.S. prisoner-of-war agent John Skinner sailed under a flag of truce to negotiate the release of Dr. William Beanes, a Maryland physician taken captive after the Washington raid. The British commanders agreed to free Beanes but detained Key and his companions aboard a truce vessel during the planned assault on the city’s harbor defenses. On the night of September 13, British warships opened a heavy bombardment on Fort McHenry, firing shells and Congreve rockets for roughly twenty-five hours while Key observed from several miles away. At dawn on September 14, Key saw the fort’s large garrison flag still flying, confirming that the American position had held.

Aftermath

Key began composing verses on the back of a letter while still aboard the truce ship. The poem, originally titled “Defence of Fort M’Henry,” was soon printed as a broadside in Baltimore and appeared in newspapers across the country within days. It was quickly paired with the existing melody of the British drinking song “To Anacreon in Heaven” and gained popularity as a patriotic air during the remainder of the war.

Legacy

The verses endured as one of several unofficial national songs throughout the nineteenth century. In 1931 Congress officially designated “The Star-Spangled Banner” the United States national anthem. The original flag that inspired Key remains on display at the Smithsonian’s National Museum of American History, and the event continues to symbolize resilience and national identity in American civic life.

Why It Matters

The poem captured a moment of national resilience during invasion, helping forge a shared American identity and symbol that endures in civic life, military ceremonies, and cultural memory more than two centuries later.

Related Questions

Why was Francis Scott Key aboard a British ship?

He was negotiating the release of an American prisoner and was detained overnight during the British attack on Baltimore.

What inspired the poem’s central image?

The sight of the large American flag still flying over Fort McHenry at dawn after a night of bombardment.

How did the poem become the national anthem?

It was set to music shortly after being written and gained widespread popularity before Congress made it official in 1931.

Who made the flag that Key saw?

Baltimore seamstress Mary Young Pickersgill and her assistants sewed the 30-by-42-foot garrison flag.

US Military Atlas: Francis Scott Key Pens Star-Spangled Banner connects to military history, war consequences, or postwar diplomacy.

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Sources

  1. What Happened on September 14, HISTORY.com. Accessed 2026-07-04.
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