Yeah, but Okinawa, China, Korea, Japan AND Vietnam?
That enhances the chances a bit.
He was helping protect a coal mine from Mao’s troops in post WWII northern China, never got a clear idea of where in Korea he was, big chunks of the 50’s and early 60s at Atsugi, Da Nang in ‘67-68.
Except for shipboard defense on the Maryland off Okinawa, mostly ground support for Marine aviation.
He was in communications, eventually becoming a commo chief as a gunnery sergeant. Went back to Okinawa again and again. I know he was in the 9th Defense Battalion in Korea and was with a survey team going to Vietnam in the late 50’s or early 60’s when it was decided we’d be taking the Frog’s place there. He went Fleet Reserve in 1965.