What was the plot-arc of Return to Europe?

[raketenjagdpanzer]

Was there an overall plot arc or was it just "Hey, assuming your players didn't go home, here's some stuff that can happen in Europe."

I always thought that given the series of modules' subtitle of "Return to Europe" that it was in a sense for whatever reason US troops being sent back into action in Europe, which considering the state of the world at large a really, really weird thing to do. Even setting aside the logistical problems of moving anything other than a tiny handful of troops and whatever stuff they could carry, back across the Atlantic.