Which is when US managers work for European based companies this causes issues if they don't adapt.(And I am sure is the case also in the other direction).

I have come across American managers move straight from Silicon Valley to Europe and not understanding that firing people in Europe (well in the parts I know, UK & Scandinavia) is rare, and not expected. Not understanding that there is a limited pool of potential new employees, with a busy grapevine, and you do not want a reputation as a hire and fire company. Not understanding that internally people no longer want to move to that team etc.

My naïve Scandinavian background balked when seeing the behavior of these managers over and over again. And made me very wary of ever working for a US company even if located in Europe. The culture clash from senior management would be too much.

Though to be fair I have met several very good American colleagues and managers as well. Obviously it is not ubiquitous.