Puck should get his Purple Heart. Normally military commanders at the brigade or wing level (full colonels) can authorize awarding the medal. Michael, as the senior member of the US Military still alive, should be able to do so.

He should award the Purple Heart to Puck, to Carl and Robbins and Muldoon, as well as to Saul, and to himself. I would also give one to Burt. and consider doing so for Riley (remember that she became a soldier at Fort Irwin, though I don't know if she's been wounded since then).