I thought this was simple when I made that first post but your posts and their wording just get more confusing, Vietnam, Korea, the UN, NATO “Action”.
What do you mean by NATO actions? How does that wording get into this?
Did your family ever serve in Europe since WWII?
Yes of course. In the 60s as a kid I lived on a US Army base in Germany, my dad was stationed there. And my grandfather, also regular Army, was stationed in England in the 40-50s.
While we were overseas (in Europe) the US army conducted exercises with other NATO armies. What is your confusion with NATO?
Again, what is your point?