sentences:  In addition to being the last U.S. veteran of World War I, Buckles was the oldest World War I veteran in the world at the time of his death, as well as the last field veteran of the war.Following his death and funeral, there were two surviving World War I veterans, British-born Florence Green and British Australian citizen Claude Choules, both of whom served in the British Armed Forces.Choules died on May 5, 2011; Green died on February 4, 2012.