Really, I would not be surprised to see the Europeans move troops into Ukraine as soon as there is a cease fire, regardless of what the U.S. wants or thinks. Once they are in there, it is a fait accompli. The Russians can’t attack them. Europe is vastly more powerful than Russia, even if the Russians think they have a great military. And Europe needs to settle the war on their terms, because if Russia takes over Ukraine, they are next in line. So, their incentive is to shore up Ukraine and stop Russia right there.