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During the American Revolution, a small, earthen star fort, known as Fort Whetstone, was constructed at the end of the peninsula at the entrance of the Baltimore harbor. Although the fort wasultimately never attacked during the American Revolution, military leaders saw the importance of coastal defenses around the young nation's third largest city and vital port. In 1798, construction began to expand Fort Whetstone with brick and stone masonry to create a new, more permanent, structure. The new fort was dubbed Fort McHenry, named after George Washington’s Secretary of War and Baltimore native, James McHenry.
NPS The War of 1812After its completion in 1803, Fort McHenry had a brief period of peace, allowing the fort to serve as an outpost for the small standing army of the United States. The country’s first light artillery unit was organized there. On June 18, 1812, the United States declared war on England following several disputes around “Free Trade & Sailor’s Rights.” Fort McHenry’s role became vital in 1813 when British forces entered the Chesapeake Bay and a campaign of terror in the region began. In August of 1814, disaster struck the American forces when they were defeated at Bladensburg and British forces captured and burned Washington D.C.
Library of Congress The Civil War (1861-1865)In the years that followed the War of 1812, Fort McHenry went through a series of changes and improvements. Buildings were expanded, outer defenses were added, and an Army colonel by the name of Robert E. Lee oversaw the construction of Fort Carroll to the southeast, adding to Baltimore’s coastal defenses. When civil war broke out in 1861, Fort McHenry’s defensive role once again became prominent. Its large cannons pointed not only towards the water to defend the city from coastal attack, but also towards the center of Baltimore in an attempt to force the pro-secession population to comply with federal rule.
NPS 20th CenturyFollowing the Civil War, Fort McHenry declined in strategic importance. Its structures and defenses were outdated for modern machines of war. However, when the United States entered the First World War in 1917 the site found new purpose. The grounds surrounding the fort were transformed into a massive 100 building and 3,000 bed hospital. General Hospital No. 2, as it was named, operated from 1917 to 1925 and marked the busiest time period in Fort McHenry's history.
Battle of BaltimoreLearn about Fort McHenry's role in one of the most pivotal battles and campaigns of the War of 1812!
The Star-Spangled BannerThis link provides more information on the national anthem and the 30x42 garrison flag that inspired the song.
PeopleThis link provides great detail of individual people and groups of people that have contributed to Fort McHenry's history. |
Last updated: April 22, 2026