Tell It to the Marines - S9-E8
Continuity mistake: The water Klinger accidentally spits on Potter goes from a number of separate spots to one big spot in a couple of seconds.
Tell It to the Marines - S9-E8
Continuity mistake: In the mess tent, after Hawkeye and BJ read about the blood donations, Hawkeye goes to fold and put the paper down. When the camera cuts to a wide shot, he's folding and putting the paper down again.
Answer: Even an Army field hospital would have SOME weapons for self-defense if the enemy attacked. What's meant is that it's not a combat outfit, and therefore wouldn't have enough weapons to actually attack anyone. (It's also mentioned a few times that the Officer of the Watch is supposed to carry a pistol at all times, but Hawkeye refuses to do it when he's in charge and Colonels Blake and Potter don't enforce the rule).
Captain Defenestrator