I did a lot of trips to FAA sites when I was up there, and we sometimes flew with an ERA helicopter pilot that was in Vietnam. I remember him saying he was shot down on his first mission, but said he must have learned something from it as he made it the rest of his tour without getting shot down again. You could definitely tell who had military training, as on take off, they would barely get off the ground and they would pitch the nose down and you'd swear the blades of the rotor were going to hit the concrete. The ones civilian trained would raise up gently and slowly roll the nose down.
