Shortly after the end of the Civil war, Wheaton was placed to command the district of Nebraska in Omaha.THE UNITED STATES ARMY. New York Times; Jan 22, 1866; pg. 8. On April 30, 1866, he was mustered out of the volunteers and was subsequently promoted as lieutenant colonel of the 39th Infantry on July 28.FOR MINISTER TO JAPAN. New York Times; Apr 6, 1897; pg. 2 He was breveted to the rank of major general in the Regular Army, to date from March 13, 1865, for meritorious service during the Civil War.
