September 13

British Bombard Fort McHenry in Baltimore

181419th CenturyMilitaryNorth Americahighexpanded detail

A prolonged British naval bombardment of Fort McHenry tested the resolve of Baltimore's defenders and gave rise to the poem that became America's national anthem.

Summary

During the War of 1812, British forces launched a combined land and sea assault on the port city of Baltimore following their burning of Washington, D.C. American defenders under Major George Armistead prepared Fort McHenry in the harbor as a key obstacle. On September 13, British ships unleashed a prolonged 25-hour bombardment with mortars and Congreve rockets. Francis Scott Key, detained aboard a truce ship nearby, observed the American flag still flying at dawn despite the assault. The fort's resistance forced the British to abandon their plans, preserving Baltimore.

Context

By the summer of 1814 the War of 1812 had entered a new phase. With Napoleon’s defeat freeing British resources, Royal Navy squadrons intensified operations along the American coast. The Chesapeake Bay became a focal point because Baltimore privateers had harassed British merchant shipping for years, and the city’s capture would punish that activity while threatening the young republic’s morale after earlier setbacks on land and sea.

What Happened

On September 12 British troops under Major General Robert Ross landed at North Point and advanced toward Baltimore, only to be checked by American militia in a sharp engagement that cost Ross his life. The next morning Vice Admiral Alexander Cochrane’s fleet moved into position in the Patapsco River. Five bomb vessels and the rocket ship HMS Erebus opened fire on Fort McHenry at roughly 6:30 a.m., lobbing mortar shells and Congreve rockets from beyond the range of the fort’s guns. Major George Armistead’s garrison of about one thousand men answered when possible, but the British maintained a steady barrage through driving rain for the next twenty-five hours.

Aftermath

An attempted nighttime passage by British boats past the fort was driven back by accurate American fire. At first light on September 14 the large garrison flag—sewn earlier by Mary Pickersgill—still flew over the ramparts. Seeing it from a nearby truce vessel, Francis Scott Key knew the fort had held. The British commanders concluded that further attacks would be futile and withdrew their forces down the Chesapeake.

Legacy

Key’s verses, written aboard the truce ship and later titled “Defence of Fort McHenry,” were published within days and soon paired with the tune of a British drinking song. The song gained popularity through the nineteenth century and was officially designated the national anthem by Congress in 1931. The successful stand at Fort McHenry helped restore American confidence after the loss of Washington and contributed to the diplomatic climate that produced the Treaty of Ghent later that year.

Why It Matters

The successful defense inspired Key's poem 'Defence of Fort McHenry,' later set to music as 'The Star-Spangled Banner,' which became the U.S. national anthem in 1931. It boosted American morale and helped shift British strategy toward peace negotiations culminating in the Treaty of Ghent.

Related Questions

Why did the British target Baltimore?

The city was a major base for American privateers that had captured hundreds of British merchant ships during the war.

How long did the bombardment last?

The naval assault continued for approximately twenty-five hours from the morning of September 13 until the afternoon of September 14.

What role did Francis Scott Key play?

He was detained on a British vessel during the attack and wrote the poem that later became the national anthem after seeing the flag still flying.

Did the fort suffer heavy damage?

No; recent fortification work limited damage to light structural harm despite more than 1,500 projectiles fired.

When did the poem become the national anthem?

Congress officially recognized “The Star-Spangled Banner” as the U.S. national anthem in 1931.

US Military Atlas: Battle of Baltimore and Fort McHenry defense in the War of 1812

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Sources

  1. The Battle of Baltimore, Naval History and Heritage Command. Accessed 2026-07-04.
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