[@shylarah] Or the siblings could just ask David, if he has been in combat, as he doesn't wear any combat pins day-to-day.

Edit: For example, when I was serving in the Finnish Defence Forces a few years ago, I took part in a garrison-wide orienteering race. While I didn't have much hope of winning any prizes, I liked the experience and tried my best, as there was the competitive element in the race. A five kilometre track took me about fifty minutes to complete, but it was fun.