What does it say "You're flying a mission to the ???er?"
I believe it says Brenner, as in Brenner Pass where they did a lot of fighter bomber work. It was one of those places where the Flak was always heavy and at times was shooting down at the Jugs as they went after trains etc. The guns were positioned in places the mountains of the pass as well as the valley floor. Throw in the flak trains, cables placed across the pass and other bits, it was a very dangerous place to go.