Born 14 December 1919
Died non Battle 29 January 1945
231st Port Company, 492nd Port Battalion
Sgt McMahan was aboard the U.S.S. Serpens. He is buried at Arlington National Cemetery in Virginia together with 249 other soldiers who returned under the WWII dead program.
The U.S.S. Serpens, while anchored off Lunga Beach, Guadalcanal, was sunk on 29 January by an explosion, due possibly to an enemy submarine attack. There were only ten survivors, An anti-submarine search was instituted immediately in the area, but with negative results. The Serpens was loaded with a large quantity of ammunition and casualties were later fixed at approximately 250.