Frank Buckle (born in Missouri in 1901 and raised in Oklahoma), who lied about his age to get into uniform during World War I and lived to be the last surviving U.S. veteran of that war, has died. He was 110.

Buckles, who also survived being a civilian POW in the Philippines in World War II, died peacefully of natural causes early Sunday at his home in Charles Town, biographer and family spokesman David DeJonge said in a statement.

Buckles turned 110 on Feb. 1 and had been advocating for a national memorial honouring veterans of the Great War in Washington, D.C.