War of 1812: Fort McHenry in Baltimore's Inner Harbor was attacked by British forces during the Battle of Baltimore, inspiring Francis Scott Key to write "Defence of Fort McHenry", later used as the lyrics to the United States national anthem.

The War of 1812 was fought by the United States and its allies against the United Kingdom and its allies in North America. It began when the United States declared war on Britain on 18 June 1812. Although peace terms were agreed upon in the December 1814 Treaty of Ghent, the war did not officially end until the peace treaty was ratified by the United States Congress on 17 February 1815.

Fort McHenry is a historical American coastal pentagonal bastion fort on Locust Point, now a neighborhood of Baltimore, Maryland. It is best known for its role in the War of 1812, when it successfully defended Baltimore Harbor from an attack by the British navy from Chesapeake Bay on September 13–14, 1814.

The Inner Harbor is a historic seaport, tourist attraction, and landmark in Baltimore, Maryland. It was described by the Urban Land Institute in 2009 as "the model for post-industrial waterfront redevelopment around the world". The Inner Harbor is located at the mouth of Jones Falls, creating the wide and short northwest branch of the Patapsco River. The district includes any water west of a line drawn between the foot of President Street and the American Visionary Art Museum.

The Battle of Baltimore took place between British and American forces on September 12–14, 1814 during the War of 1812. Defending American forces repulsed sea and land invasions off the busy port city of Baltimore, Maryland, by British forces.

Francis Scott Key was an American lawyer, author, and poet from Frederick, Maryland, best known as the author of the poem "Defence of Fort M'Henry", which was set to a popular British tune and eventually became the American national anthem "The Star-Spangled Banner". In 1814 Key observed the British bombardment of Fort McHenry in Baltimore during the War of 1812. He was inspired upon seeing an American flag flying over the fort at dawn: his poem was published within a week with the suggested tune of the popular song "To Anacreon in Heaven". The song with Key's lyrics became known as "The Star-Spangled Banner" and slowly gained in popularity as an unofficial anthem, finally achieving official status as the national anthem more than a century later under President Herbert Hoover.