Russia is willing to endure tremendous human losses in the hopes that it will sap Ukraine of the resources and will to keep fighting. Ultimately, the Kremlin leader wants to regain political sway over Kyiv, reclaim Russia’s status as a great power and secure his place in history, Russia watchers say.

With Russia stepping up its attacks on Ukraine’s energy infrastructure, we speak to our correspondent on the ground and find out how Ukrainians are fighting to hold on through another winter.