Or you could look at it the other way where when we were sending US munitions to the Ukrainians they drove the Russians all the way back to the original lines and were hitting the Russian ships in the Black sea... Then when we stopped sending the US funding and weapons it took it's turn. I figure it like this if Ukrainians who were new to our weapons could use them the way they were before we cut them off I would go as far as to say that those same weapons in the hands of the US Military who were trained to use them would have Putin crying for his Mama.
