They usually give you a coin for participating in any military operation. Also the high up people usually have a personal coin that they give to soldiers. It might seem odd but it's relatively common. I have a few from when I was Air Force and my Grandpa has some old ones from the Marines.
I have seen challenge coins used as a game, usually navy guys. Whoever has the coin from person with highest ranking doesn't buy drinks. Very valuable to an enlisted guy who likes his beer.
They usually give you a coin for participating in any military operation. Also the high up people usually have a personal coin that they give to soldiers. It might seem odd but it's relatively common. I have a few from when I was Air Force and my Grandpa has some old ones from the Marines.
I have seen challenge coins used as a game, usually navy guys. Whoever has the coin from person with highest ranking doesn't buy drinks. Very valuable to an enlisted guy who likes his beer.