According to biographer Robert Caro, LBJ was the only member of Congress not to give up his seat when he enlisted.
MacArthur took notice, and arranged for LBJ to get a Silver Star for going along on a bombing mission as an observer, the general figuring that the military was going to need friends once the hostilities ceased, and pegged LBJ as such a vain medal "winner", and as an abject politician that would have to be dragged dead, from office.
You'll note that LBJ almost always wore the ribbon for his Silver Star.
Don't know what the actual bomber crews got for that same mission...
My understanding is that aircraft LBJ was on during that bombing mission turned back before the target due to engine problems.