Defensive tactics from the modern history of urban warfare
What I'm wondering, with Russia being a nuclear power, what is Ukraine's end game? They seem to be doing a pretty good job of destroying invading force so far, but what's next? They either run out of steam defending, or they start to hit back at Russia, but then Russia could just unload a few nukes on them and be done with it. The West seems intent on not getting involved, and if they won't risk conflict now due to mutually assured destruction, they won't risk it after Russia uses nukes on Ukraine either. Is getting the Russian military to turn on Putin the only hope?