Loosely based on John Basilone?

Many striking similarities.....U. S. Marine,nicknames Shanghai Jack/Manila John, manned a machine gun nest on Guadalcanal, won the Congressional Medal of Honor for his action, went on a war bond tour, (Basilone)had an affair with the actress Virginia Grey during the bond tour in which they both participated, became an instructor at Camp Pendleton for a brief time before returning to the Pacific theater where he was KIA at Iwo Jima.