Civil War Union Army Officer. During the Civil War, he was commissioned as Captain and commander of Company G, 19th Ohio Volunteer Infantry on April 22, 1861 at age 54, and was promoted to full Major on May 29, 1861. Served until his regiment was mustered out on August 27, 1861. He re-enlisted on August 31, 1861 as Colonel and commander of the 29th Ohio Volunteer Infantry. The 29th Ohio served in Maryland and Virginia from January 1862 until the fall of 1863, taking part in the Battles of Winchester, Port Republic, Cedar Mountain, 2nd Bull Run, Chancellorsville and Gettysburg. In September 1863 it was transferred with General Joseph Hooker's Corps to the West, fighting at Lookout Mountain before joining General William T. Sherman's Atlanta Campaign. The unit took part in the battles of Resaca, Dallas, Kenesaw, Peachtree Creek and the seige of Atlanta. They participated in the celebrated March to the Sea and the drive through the Carolinas, After the fighitng ended the went to Washington, then by rail to Cleveland where they were mustered out on July 22, 1865. The the G.A.R. Buckley Post Memorial is located near his grave.