William R. Terrill was a Virginia-born Union general during the American Civil War (1861–1865). Three of his brothers fought for the Confederacy, two of whom died, including, who was killed in 1864. Disowned by his family, William Terrill distinguished himself in the Western Theater of the war, including at the Battle of Shiloh in April 1862. A strict disciplinarian, he was “a drunken old tyrant” in the words of one soldier. Others were more sympathetic, with a Union captain arguing that he was “a first rate fighting man.” Terrill was promoted to in September 1862 and, in October, commanded a brigade at the Battle of Perryville, Kentucky, where he struggled with coordinating both infantry and artillery, raw recruits and professional soldiers. He was killed in the fighting.