The “American” on the left is the same one shown in memes of crisis actors on Jan 6. The squashed nose guy. I don’t believe he’s a real soldier; I think he’s Antifa.
That photo is from 2018. Found doing a google search on the photo
https://therealnews.com/the-us-is-arming-and-assisting-neo-nazis-in-ukraine-while-congress-debates-prohibition
