Conversation so far:
What was Ira role in the World War II?
Hayes enlisted in the Marine Corps Reserve on August 26, 1942.
How long was he in the reserve?
and in October volunteered for Marine paratrooper (Paramarine) training at the Marine Parachute School at Camp Gillespie located east of San Diego.

Question: did this training helped him in the war?
Self-contained rewrite: Did Parachute School  help Ira Hayes in the war?