You mean, it's hard to know what the US is doing. Right? I am the Germans and I am fighting against a US AI.
If it is interesting to you, I CAN send several game saves from the last day.
What I can promise you is that I came down the E highway (running east out of Bastogne through Neffe-Magaret) en masse and hammered them with massive forces. They SHOULD know I am coming. LOL.

This is why I was surprised to see NO American units between my German KGs and the town center at end of game. If I had ONLY been a LITTLE faster.
Again, I would really think they SHOULD know I was coming. They encountered massive German formations coming at them down that NE highway for the last two days of the game.