5 in Naval Air - five minutes into the eye exam, career over
2 in Marine Helicopters - 2 seconds into the letter inviting me to apply for Marine helicopters the letter went into the circular file
2 in the army - 2 hours into the draft induction physical (hurry up and wait) they took an x-ray of my left arm to check out an old injury and sent me home.
28 months in the US Peace Corps in Kanchanaburi, Thailand, home of the Bridge on the River Kwai
It's not military and I never saw a shot fired in anger. However once in the Mosquito Bar in Klong Toey a fight broke out and a shot glass missed my head by inches.