The Sniper - S2-E10
Continuity mistake: When Hawkeye is preparing to go for his picnic, Radar brings him some brandy from Col. Blake. There is only a small amount of brandy in the bottle, which is commented on. Radar takes a jug of martini from the still to top up the bottle, but this is not done and the jug of martini remains on top of the stove untouched. When the picnic scene takes place, the brandy bottle is now nearly full with the brandy/martini mix. (00:10:00)
Deal Me Out - S2-E13
Continuity mistake: From behind, Klinger's cigar is full length, with no signs of being lit. When he responds to Hawkeye's question, it is noticeably shorter.
Continuity mistake: In Henry's office, the white cloth Radar has on his ears changes positions from shot to shot.
Continuity mistake: When in the Swamp, and they show Hawkeye numerous times, the door to the stove is open, then closed, then open, etc.
Continuity mistake: In Henry's office, Burns tosses the stapler toward Radar, and it flips midair. When it falls Ito the file Radar has, it flies level, that is, not twisting in the air.
Continuity mistake: As Hawkeye and Trapper leave the Swamp to watch 5 O'Clock Charlie, Hawkeye is carrying a folding chair, and Trapper has the thermos and glasses. At the show, they both have folding chairs.
Continuity mistake: As Radar turns from Henry's desk, the tote board he has under his arm disappears as he approaches the file cabinet.
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.
Deal Me Out - S2-E13
Continuity mistake: During the poker game Frank walks in wearing a white hospital scrub, then the camera pans to Sidney and back to Frank who is now wearing a army jacket. (00:08:12)
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.
Hot Lips and Empty Arms - S2-E14
Continuity mistake: When Margaret comes into Henry's office, interrupting the "training film" Hawkeye's part flips from being on the left to the right and back.
Continuity mistake: As Hawkeye goes to leave the Swamp, the club he's holding goes from the top of the grip an inch or so above his fist, to the top in his palm.
As You Were - S2-E20
Continuity mistake: When Klinger's in Father Mulcahy's tent he pulls up a chair and when he sits down he places his purse on his lap, but in the closeup the purse strap is now around his left arm.
Continuity mistake: During Henry's home movies of Molly's birthday party, Lorraine brings out the cake with candles and sets it on the table, but the cake differs between the shots - note the writing.
For the Good of the Outfit - S2-E4
Continuity mistake: Hawkeye mails a letter to his father which is delayed in its delivery, and when Hawkeye finally receives a reply from his father it's dated May 24, 1951, but in the previous episode "Radar's Report" the weekly report that Radar typed up was dated October 17 through October 22, 1951.
Continuity mistake: As the camera looks at the door of the Officer's club while the General and Hawkeye talk, other tents can be seen behind them. As Hawkeye brings in the enlisted personnel, the area is totally empty.
Continuity mistake: The amount of alcohol in the bottle Hawkeye holds in the Swamp goes from full to half empty and back between cuts.
Continuity mistake: As Radar is sorting mail, and Trapper makes a joke, Radar starts to put a letter down. After the angle change, he puts the letter 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