Joseph Brady Mitchell (September 25, 1915 – February 17, 1993) was an American military historian. He is the author of Decisive Battles of the American Revolution, Decisive Battles of the Civil War, Discipline and Bayonets: The Armies and Leaders in the War of the American Revolution, Twenty Decisive Battles of the World, Military Leaders of the Civil War, and The Badge of Gallantry: Recollections of Civil War Congressional Medal of Honor Winners. He served for 18 years in the U.S. Army and achieved the rank of Lieutenant Colonel.