American author and illustrator known for his articles and reviews that were published in American Mercury magazine.He also wrote the books Jeb Stuart and Gone to Texas.
He was a was a Lieutenant Colonel in the United States Marine Corps and served in World War I.
He had a U.S. Navy destroyer named after him, the USS John W. Thomason (DD-760).
He married Leda Bass in 1917, and they had one son named Jack.
He was a friend and classmate of Marine and author Laurence Stallings.