So far the miniscule Ukrainian army is not quite holding its own against the much larger Russian military. As long as the Un-United States keeps pouring billions of dollars of military hardware into the shithole known as The Ukraine, they will continue to not quite hold their own, and the rest of Europe will continue to watch, and criticize Trumps efforts to end the war. All the while, the whining little Napoleon of Ukraine begs for money, and dictates what he will, and won't accept for peace terms.
I say, give the rest of Europe 90 days notice that the Un-United States is kicking all of Europe off the taxpayer tit, and they're on their own with Russia.
As to Russia vs Un-United States military. I don't believe that Russia would have a snowballs chance in hell whipping our military. But I don't want the fight.