Abner Doubleday (1819-1893) was a U.S. military officer who served as a Union general during the Civil War (1861-65). A native of New York, Doubleday graduated from West Point and served during the Mexican-American War (1846-48). In 1861 he was second-in-command at Fort Sumter, where he ordered the Union’s first shots of the Civil War in response to the bombardment by secessionist forces. Promoted to brigadier general in February 1862, Doubleday participated in the Second Battle of Bull Run (Manassas) and the Battle of Antietam later that year. Doubleday led a corps on the first day of the Battle of Gettysburg in July 1863, and then served in administrative duty in Washington, D.C., for the rest of the conflict. After the Civil War Doubleday remained in the army and was stationed in California and Texas. He died in 1893 at the age of 73. Doubleday was popularly credited with inventing the game of baseball for many years, but this claim was later debunked.