Continuity mistake: The German General Pemsel says, "Wir haben starke RADAR-storungen," which means "we have strong radar interference." In 1944, the word "radar" was not used in Germany, and quite likely not even known. The Germans used a comparable system, called "FunkmeBgerate," which basically means "radio measuring equipment."
Continuity mistake: Near the start, Oberst Helmuth Meyer enters, wearing a long leather coat, which is dry. A few seconds later he turns away in another shot and the back of his coat is covered with rain drops. Shortly after that, he's shown again facing the camera and his coat is lightly sprinkled with rain drops, which weren't there in the earlier front view.