Continuity mistake: Charles (in scrubs), Radar, and Father Mulchahy are all in the changing room when Radar and Mulchahy go take a phone call. When entering the comm room, Charles has appeared and is complaining about waiting for a phone call in his fatigues.
Continuity mistake: When BJ and Hawkeye are peeking into Radar's box of bees, in the wideshot there's tape on the box, but in the closeup the tape has vanished.
Preventative Medicine - S7-E22
Continuity mistake: In Potter's quarters Klinger's arm holding the chicken goes from in front of his chest to by his waist between shots.
Continuity mistake: When the pit boss is taking the rolled up 5 containing the pair of dice out of his pocket, his fingers are hiding the end toward Mulcahy. When the camera angle changes, the fingers are moved so Mulcahy can see the hidden dice.
Continuity mistake: Charles arranges a prank that involves a cake. The cake looks totally different in the respective shots. At least three cakes were involved: The one Klinger gives to Margret looks different from the one she holds in her hands when walking over to Capt. Hill. The one she holds in her hand in the closeup counter shots is yet another pie.
Preventative Medicine - S7-E22
Continuity mistake: As Lacey tells Margaret of his plans, he has his fork in his right hand. After she asks "What makes that hill so important?" he suddenly has the knife in his right hand, and the fork in the left.
Peace on Us - S7-E2
Continuity mistake: When Hawkeye, Charles, and BJ are in the Swamp, Hawkeye starts his roll about being sick of green, and by the time he heads outside and talks to Margaret the blood splatter on his surgical gown changes.
Continuity mistake: As Charles talks to the guys in the Swamp, his right hand alternates from up at his chest to down by his side several times too quickly to be normal.
Preventative Medicine - S7-E22
Continuity mistake: In the Mess Tent, as Lacey explains the reason he wants the hill to Margaret, he is holding a knife in his right hand. A second later, it's gone.
Peace on Us - S7-E2
Continuity mistake: As Hawkeye storms out of the Swamp, he leaves Charles, Potter, and BJ behind. After the angle changes, you can see there is nobody in the tent, and the still is missing.
Continuity mistake: As Klinger and Margaret are talking about the date, he takes a sip of his drink and goes to put his hand down. After the angle changes and he goes to say his line, he repeats putting the glass down.
They Call the Wind Korea - S7-E7
Continuity mistake: When Klinger is coming over the hill at the end of the episode, the camera shows him in the outdoor setting, and the spot he's on has sparse vegetation. When the camera goes to a close up of him, the trees and shrubs are thicker and closer to him. This alternates a couple of times.
Continuity mistake: Private Rich's left boot is totally black when he's put on the chopper. When it goes up, it's worn to the bare leather, and back to new looking during the landing.
Preventative Medicine - S7-E22
Continuity mistake: When Klinger enters Potters' tent, the bird alternates from about waist height to chest height between shots.
Continuity mistake: When Potter is on the phone, he turns to hush Hawkeye and BJ. As he does so, he's holding the receiver with his left hand, and covering the mouthpiece with his right. He then puts his left hand down on the arm of the chair. When the camera cuts in for a close up, his left hand is on the phone again.
Continuity mistake: Margaret comes in to the Officer's Club, and tells Klinger that the drinks are on her. He puts down two glasses, and starts to pour. When the camera cuts to a close up, he's just starting to pour into the same glass again.
Continuity mistake: While Igor is serving dinner, his cap peak goes from being up in the front shot to down in the side shot, while he is talking to Col. Potter.
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