Captain Newman, M.D.Goofs
Italy surrender in 1943. All Italian prisoners would have been released. The primary form of transportation during WWII was train not plane within the U.S.. ships were used outside the US. If this was supposed to be the end of 1944, the war had not been won yet. The battle of the bulge was underway and Japan was not any where close to surrender. No bases were closing at all.
When Capt. Newman opens the champagne bottle in the Officers' Club, there is a "pop" when the cork is removed. However, when pouring the champagne into Lieut. Corum's and his glass, there are no bubbles then or when they drink from the glasses. The liquid has no "fizz" and is thus not a carbonated drink like champagne.