Continuity mistake: Hawkeye is in the Swamp talking with Trapper. Hawkeye leaves and walks past the tent - Trapper is not inside. (00:07:30)
Continuity mistake: In one of the earlier episodes Henry becomes the father of a baby boy; his other two children have been established as Molly and Janey, both girls. In "Abyssinia Henry," Henry get his discharge papers and wanted to call home with the good news. He tells Radar that he will have to wait a while, as his son, Andrew, will be practising his trombone. As Henry only has one son, Andrew has to be the son who was born while Henry was in Korea. Even if Henry was in Korea from the very first days of the war, by the time he left his son can't be any older than 18 months - hardly likely to be playing a trombone.
Factual error: When reminiscing about Radar's appendectomy, Henry says it took a long time to find because it was behind his secum. The appendix is behind the secum in more than 50% of people, so this shouldn't have fooled a doctor of Henry's caliber. (00:09:00)
Factual error: When Frank sits down on Margaret's bed, he pulls a single metal star out of his butt. Kelly being a Lt. Gen, he should have (and has, as can be seen in other scenes) a single bar of three interconnected stars, not three single ones. Therefore Frank shouldn't be able to find a solitary star in Margaret's bed. (00:19:00)
Springtime - S3-E6
Other mistake: While Radar is measuring the camp, he says that last year they had 2,986 square feet, but this year they have 2,863 square feet. The square root of 2,863 is about 53.5, so unless the camp is 53 feet by 53 feet (!) his numbers are WAY off. (00:16:15)
Continuity mistake: First, Radar is seen drumming on his tin cans with bare hands. After cut, when the hula girl appears, without interruption of the drum pattern, he suddenly is holding some sort of drumsticks. (00:15:00)
Aid Station - S3-E19
Factual error: Mulcahy asks Hawkeye if he trusts God. Hawkeye replies "It says I should on all of my money." However, the phrase "IN GOD WE TRUST" didn't appear on American bills until 1957.
Continuity mistake: In the office, Radar is getting ready for bed, and has taken off his shirt. When he goes to tuck in his Teddy, he suddenly has sleeves.
Visible crew/equipment: When Trapper and Hawkeye walk into the Swamp and find Dr. Pak waiting for them, the edge of the tent set can be seen at the top left corner of the screen.
Visible crew/equipment: While the Greek shipment of food is being brought into the mess tent, when the cook carrying the lamb walks behind the table, the edge of the tent set can be seen at the top right corner of the screen.
Visible crew/equipment: After Henry meets with Colonel Blanche, the Luxembourg Commander, it cuts to Hawkeye in the Swamp continuing his recording to his father, and when Trapper describes his recipe for the dry martini we can see the open edge of the tent set and a spotlight at the top left corner of the screen.
Visible crew/equipment: After the scene in the x-ray room with Henry asking Hawkeye and Trapper to "read between the lines" in the letter from Henry's wife, when it cuts to Radar on the phone the shadow of the boom mic can be seen on the wall at the top left side of the screen, right before it's pulled up.
Continuity mistake: During the inspection of arms, when Frank stands in front of the second soldier in line, the soldier's left collar is flipped up and his right collar is folded underneath his shirt in the shots facing him, but in shots facing Frank the soldier's entire collar is properly positioned.
The General Flipped at Dawn - S3-E1
Visible crew/equipment: After Hawkeye disobeys General Steele's orders, when it cuts to the preliminary hearing in the mess tent, the chalk T-mark can be seen on the floor under the bench at the chopper pilot's feet, where he will stand in a moment.
Adam's Ribs - S3-E11
Revealing mistake: While Hawkeye's in the mess tent leading the protest shouting "we want something else" he climbs the tent pole, and in two of the wideshots the camera has panned a bit too far to the right, and we can see the edge of the tent facade set at the top right corner of the screen.
Aid Station - S3-E19
Visible crew/equipment: As Hawkeye walks into the Aid Station, the shadow of the camera plays across his entrance. Also, the area he walks through is extremely well lit, despite the fact the sun is behind the station, indicating stage lighting.
Adam's Ribs - S3-E11
Revealing mistake: As Radar, Henry, Klinger and Trapper get up to answer the emergency call, the outside background can be seen in the upper right corner of the shot, showing it was done on a sound stage.
Adam's Ribs - S3-E11
Character mistake: As Hawkeye obsesses about ribs, Henry says that he met Lorraine at the Dearborn Street Station. But while watching home movies sent to him, Henry said he met her at a freshman mixer.
Continuity mistake: When Margaret asks Frank for cash to help her sister get an apartment, he asks about her father leaving her anything, implying that her father is dead. Later on, we see her father when he comes to visit her in another episode.
Continuity mistake: When Henry kisses Margret, she grabs her hat. In the reverse shot, her hand is around Henry's neck. After the next cut, it's on her hat again. (00:20:00)
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