... had WW2. In Europe people hid from the guns and tried not to fight the germans... Where does say the U.K. fit in that list?"
I can't allow that to stand.
Far from "hiding", the UK entered WW2 well before the US, and sacrificed a significantly larger proportion of its population to fighting the Nazis than the US did - 384K UK military personnel died, 417K US.
Full stats here...
Of course the Soviet Union made the greatest sacrifice, by far, in terms of sheer numbers of deaths.