Russia has suffered colossal losses in men and matériel (Ukraine, too - but that's a diff. discussion). Contrariwise: Not a single American serviceman has died fighting against the Russian invasion.
By no stretch of the imagination is that "essentially" the same thing as "fighting a war."
Regards,
Yet using our taxpayer funds is okay right? Using US servicemen and women to train and advise? Right, we aren’t fighting Russia. /sarcasm on