Answer
Frank Buckles was 40 years old during World War II. He was the last surviving American veteran of the war, having served in the U.S. Army during the conflict. Buckles was born in 1901 and enlisted in the Army in 1917. He served in France during World War I and was discharged in 1919. He re-enlisted in the Army in 1940 and served in the Pacific during World War II.