Erwin was assigned to the 1st Aero Squadron on 19 July 1918.
As a Salmson 2A2 pilot, he scored his victories between 15 September and 22 October 1918; half of them were with gunner Arthur Easterbrook.
Erwin was assigned to the 1st Aero Squadron on 19 July 1918. As a Salmson 2A2 pilot, he scored his victories between 15 September and 22 October 1918; half of them were with gunner Arthur Easterbrook.
William Portwood Erwin