@JSOP, in the above link of mine, read this: "6981st
Civilian Support Group, Germersheim".
I've been in a different unit, in a different city.
I've been throughout all the years loyal to the US, till 2014 or so, when I saw what it did in Ukraine, all the media lies, and then repeated the same lies in and about Syria...
I guess most of the people who have worked for the Yankee Dollar later came to the conclusion that they served and worked for a lying criminal empire... Of course I'm disappointed, also of myself b/c I couldn't see it then :-(
Btw, I can also tell an anecdote from that old times:
A US general stationed in the US came over to Europe on an inspection tour to visit also our unit. I had the duty to show him our locations and installations. He inspected everything very carefully, and saw that on a portrait of the then president Reagan his name was written as "Roland" instead of "Ronald"...

Oh, man, what a shaet! Of course it was not my fault but the fault of the maker of that portrait...
See also:
https://www.thebalancecareers.com/can-a-non-u-s-citizen-join-the-united-states-military-3354092