Trivia: The Consultant whom Hawkeye and Trapper meet in Japan is played by Alan Alda's father Robert.
Trivia: When Frank demands the Greek soldier's name and serial number, he gives Frank the number in Greek numerals. It translates to 2688125. (00:10:15)
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