John Aaron Rawlins (February 13, 1831-September 6, 1869) A practicing lawyer prior to the Civil War. A close aide to General Ulysses S. Grant during the Civil War, in which he attained the position of brevet major general. After the Civil War, Rawlins served as Secretary of War under President Grant from March 13, 1869 until his death from tuberculosis on September 6, 1869.