The national anthem of the United States, "The Star-Spangled Banner," was written by Francis Scott Key. Key composed the lyrics in 1814 after witnessing the bombardment of Fort McHenry during the War of 1812. He was inspired by the sight of the American flag, known as the "Star-Spangled Banner," flying over the fort after the battle, which symbolized resilience and patriotism. The lyrics were originally set to a popular tune of the time, and "The Star-Spangled Banner" was officially adopted as the national anthem in 1931. The anthem reflects the spirit and history of the United States.