Well, just a thought here.
When using GWX in 1945... you really need to play as if they are trying to kill you.
In fact, play paranoid.
...and you need to use every trick in the book to shake 'em.
I do admit to having a bit of a chuckle remembering something me and some of my army buddies would do when we were bored...
We'd be in the middle of the desert wearing green... then we'd freeze suddenly and proclaim, "I'm camoflaged! You can't see me!"
1945 was something like that for U-boats.