Much of the failure of the Russian operation in Ukraine is explained by, surprisingly, old Soviet doctrine, from operational command to logistics, small unit tactics, combined arms, etc. I am curious as to how much different the Ukrainian military is handling the same. Although they are on the defense, clearly they have had many successes and over performed expectations at least as much as the Russians have under performed. Is that because the Ukrainian military has come that far from their Soviet heritage by way of Western European training and advising, and lessons from Crimea and Donbas? Or is the Ukrainian military still largely a facsimile of the Russian, but have performed better in many ways due to circumstances (defending the home land), nationalism, and aide? I think the final analysis will be fascinating.