The Marine Corps wants to establish and Irregular Warfare regiment with foreign nationals.
https://www.strategypage.com/htmw/htsf/20180210.aspx
Wonder what Chief of Staff George Marshall would think of this? At a suggestion to allow German POWs to enlist, he scuttled it with a pithy, "no Hessians".
This has been kicked around off and on for over a hundred years. The closest we ever got was the Philippine Scouts.
https://en.wikipedia.org/wiki/Philippine_Scouts
If I was a few millennia younger I'd join .... but only if they had AFVs