 Boutelle served at Antietam, Spotsylvania, Cold Harbor, Wilderness, Gettysburg, and the Second Battle of Bull Run.He served on the staff of General James H. Wilson, under General Philip Sheridan, and was mustered out on July 19, 1865.On February 12, 1866, he reenlisted as a private in the regular Army, and was sent, via Panama, to the West to join the First Cavalry's Company F. By November 1866 Boutelle was at Fort Boise, Idaho, at the beginning of Crook's Winter Campaign.