OH YES!
The US has parked an army in Germany for 75 years!
I dunno, but could this have been a factor in the "no war between European powers" thing?
And when we say "war between the UK and Ireland... unthinkable" do we mean that no-one is going to bomb or shoot people in the UK or Ireland to attempt to achieve a political objective in the relationships between those two countries? That would be jolly nice if it were come to pass !