how many soldiers died IN germany?

Concur. Even Europeans have blind spots about WWII history; it isn’t exclusively an American failing, as my conversations with a German exchange student revealed.

Only a bit more than the British casualties during the First Day on the Somme.

My friend IS russian(ethnic), and I refer to myself as American (even if I should say
United States American)
.
What was important to us, is, how many of our bunch were involved.
we kinda ignore everyone else. In a perfect world this shouldn’t happen
but, it does.

It’s not wrong. It’s called synecdoche, and it’s an established rhetorical device.