The Tooth Shall Set You Free - S10-E14
Continuity mistake: As Potter tells Charles about the bad tooth getting worse, Charles' right hand is just above his tray. When the camera is looking at Charles a second later, his hand is chest high.
Hot Lips and Empty Arms - S2-E14
Continuity mistake: In Henry's office, Margaret has pins in her hair over her ears. When she comes out to see Henry, the pins are gone.
Continuity mistake: On The Bus, as Hawkeye raises Mrs. Kwang's legs for delivery, Radar is turning around, hiding his face. In the close up, Radar turns around again.
Continuity mistake: As Hawkeye makes his offer, Frankenheimer is sitting with his hands clasped. He starts to unclasp his hands and put them on the chair arms to stand. When the scene shifts to him alone in frame, his hands are clasped again.
Continuity mistake: As Potter is introducing Cavanaugh, his right hand is empty from the quarter profile view. In the frontal shot, he suddenly has his drink in his hand.
Visible crew/equipment: As Klinger sits in the chair dressed in a winter coat, you can see the boom mic and light panel reflected in his shades.
Visible crew/equipment: A crew member is visible in Margaret's tent when she confronts OR nurse Helen about her drinking, approximately halfway through the episode.
Continuity mistake: As Frank and Henry sit at Henry's desk, and Henry is holding his doll, the cigar he has goes from his mouth to hand and back again.
Are You Now, Margaret? - S8-E2
Continuity mistake: After Hawkeye, BJ, and Charles enters Margaret's tent, Charles steps from behind Hawkeye to look at Williams. A moment later, after the angle changes, Charles steps from behind Hawkeye again.
Follies of the Living - Concerns of the Dead - S10-E10
Continuity mistake: In the Swamp, after another drink, Charles puts a clamp on BJ's hand. As he does, the points are facing Hawkeye. In the wide shot, they're pointing at BJ. Then after Charles passes out, they're pointed at Hawkeye again.
The Nurses - S5-E5
Continuity mistake: As The Nurses look at Baker, Walsh is keeping a lookout, then straightens up, partially turns and raises her right arm. A second later, she's back in position, and starts to straighten again.
Continuity mistake: After the movie breaks, Hawkeye is giving an over dramatic intro to Margaret. He has his left arm raised, and a second later, both hands are at chest level.
Revealing mistake: There is a lag between the interior lights going out and the exterior stage lights going on.
Visible crew/equipment: In the kitchen, as Klinger and Winchester banter back and forth, the shadow of the boom mic can be seen in the upper right corner of the shot.
Visible crew/equipment: In the last scenes of the episode, the overhead shots showing the parade where Klinger rides in on Sophie, dressed (undressed) as Lady Godiva, you can see the boom mic in view at the top of the screen.
Continuity mistake: As Mulcahy enters and is introduced by Potter, he assumes the podium, and clasps his hands behind his back. A second later, his arms are by his sides.
Continuity mistake: Charles and the G.I. lay waiting for an explosion. When the last mortar hits, the explosion is just to the left of the back tire, the jeep is untouched. After a cut, the jeep is trashed and burning.
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