America is better at war. Shock and Awe was effective. War is an atrocity, to be good at it you have to be willing to commit atrocities. If Russia had started out with a similar strategy Ukraine might be an occupied territory of Russia right now. I don't support any invasion, but if you decide to invade a country you need to hit them hard before they have time to organize their defense. I think Russia had some weird Idea that Ukraians were going to welcome them as liberators. I think this is because the Russian government began to believe their own propaganda. Putin surrounds himself with people who tell him what he wants to hear.