Time to bore you with some more of my new covers. But I want you to contribute too.
The US overrun countries series is quite popular here. I saw several threads devoted to them.
I got three this weekend sent to two soldiers in the US army in 1944.



And it occurred to me I don't often see these on covers. In fact it was easier to get a mint set (off cover) than a used set (still working on those).
So, let's see your overrun country series on covers.