Most of you probably don't remember but Pat claimed he was a 'combat Marine in Korea' and a 'combat veteran', and that really pissed off his fellow Marines who actually were combat veterans. Like George H.W. Bush before him, Pat's father was a Senator, who made sure his son was far from the combat zone. In fact, on the ship ride to Korea the ship inexplicably stopped in Japan, where Robertson got off, along with three other fellow Marines and were stationed there. That was his dad behind it. The other three were included to not make it look obvious.
The other three wanted to rejoin their company, so unfortunately, Pat had to go with them or lose face. But once they arrived in Korea, his father made sure he didn't join his company on the front lines, instead making him an adjutant to some officer safely in the rear. I remember his fellow Marines speaking out about this.