Zelensky's dangerous game: That's what lies behind the dispute with army chief Saluzhny. Any new commander will still be fighting a larger, better-armed force in a war that has reached a grinding stalemate.

Russia has more military forces and weapons than Ukraine, and for Kiev to win on the battlefield, it must mobilize at least 400,000 more soldiers. Ukraine also has to prepare for losses that are likely to be comparable to those of last year, a senior official familiar with the meeting said.