"retired" US special forces. 
“They’re building a million man army full of battle-hardened veterans trained on the battlefield against NATO tactics and equipment in modern ground combat.
The last US troops that saw actual combat in Iraq and Afghanistan are now pushing retirement age, if not already retired from the military. “
Yes. At this point Russia may well actually want US aircraft introduced into the conflict so they can refine their tactics against them.
Also. US combat experience in Iraq, Afghanistan - that’s not peer war. We know from Iraq/Afghanistan veterans that have volunteered in Ukraine: they say Ukraine is nothing like what they did in Afghanistan etc.
The only current US military with Ukraine experience is the small number of US special forces there now.
"retired" US special forces.