From American Civil War Soldiers: 1. Orrin R. Sisson enlisted in the Civil War on Aug. 8, 1862. He served with Distinguished Service in the Union Army, New York. He enlisted as a Private on Aug. 8, 1862 at the age of 18. He enlisted in Company K, 136th Infantry Regiment NY on Sept. 26, 1862. He was promoted to Full Corporal on Dec. 31, 1864 and mustered out of that unit on May 18, 1865 in McDougall General Hospital, NY Harbor. 2. Orrin R. Sisson enlisted in the Union Army of the Civil War as a Private on Oct. 1, 1861 at the age of 18. He enlisted in Company F, 85th Infantry Regiment New York on Oct. 16, 1861 and served with Distinguished Service. He was discharged from that unit on Dec. 1, 1861. 3. Orrin Sisson of Lagrange, IN enlisted in the Union Army of the Civil War on Aug. 29, 1862 and served with Distinguished Service. He enlisted in Company G, 88th Infantry Regiment Indiana on Aug. 29, 1862. He mustered out of that unit on May 26, 1865.