William Birney (May 28, 1819 – August 14, 1907) was a professor, Union Army general during the American Civil War, attorney, and author. An ardent abolitionist, he was one of three superintendents in charge of enlisting colored troops into the Union Army, and in that capacity organized seven regiments. After the war, he established a law practice in Washington, D.C., and after retiring, wrote profusely on religion and history, and authored a biography of his father, James G. Birney.Photograph credit: unknown; restored by Adam Cuerden