Ukraine
The tragic thing is the further Ukraine attacks into the teeth of the Russian positions the harder its going to get. As Ukraine attempts to strike deeper they are getting further way from their supplies, artillery etc, and the Russians have had a lot more time to prepare defensive positions. I mean the Russians have occupied the areas around Melitopol, Berdyansk & Mariupol for over a year now. I doubt the defenses are going to easier. That's likely the Russians game. They have more cheap lives to give then Ukraine and in 3 months it will almost be winter again in Ukraine. Unfortunately, time isn't on Ukraine's side and the Russians know it.