You said in your original post he, "was also in the USMC 9th Amphibian Tractor Company "C" Fleet Marine Force located in the South Pacific."You also said, "He was moved to the 4th Seperate Amphibian Tractor Company Fleet Marine Force in Dec 1945." This date would have been after the war had ended, so I'm led to wonder, where was he before he was "moved" to the 4th? Don't want to give you a "bum steer", but I'm still a little suspicious that his outfit might have been the 9th AmphTracBn. Two things in your last post hint, again, in that direction. You said he was on Okinawa, and that he was eligible to wear the Pres Unit Citation ribbon. Further research in my materials shows the 9th AmphTracBn awarded the PUC while attached to the 6th Mar Div during the Okinawa operation.