On February 14, the spokesman of the Armed Forces of Ukraine Yevlash: Commander-in-Chief Syrsky came to Avdiivka to personally command, and the Russian army will suffer serious consequences;
On February 17, the Russian army announced the complete occupation of Avdiivka.
There is one thing to say, the Ukrainian army is no longer able to fight on the frontal battlefield, and Zelensky for Syrsky has a meaning of changing Zhao Kuo, the difference is that Zaluzhny is not Lianpo.
Zaluzhny did not implement the defensive strategy from beginning to end, but chose to strategize on various fronts last winter, and as a result, instead of attacking the city and grabbing land, he lost a large number of living forces under the superiority of the Russian army's artillery fire. The Ukrainian army is already numerically inferior to the Russian army, and with such a high battle loss ratio, I can't think of a second reason except for being forced by Zelensky to get NATO assistance and even end the game by Zelensky.
Sooner or later, the existing living forces in Ukraine do not allow Zaluzhny to continue to maintain a defensive posture, so it is necessary to replace Syrsky, who is a strategic decisive faction. The problem is that choosing a strategic decisive battle means that it is necessary to concentrate forces and cannot hold all fronts, which will also accelerate the speed of the Russian army's siege of cities and land, which may coincide with the strategic intentions of the Russian army. (Putin's public speeches have made it obvious that the strategic goal of the Russian army is to annex the whole of Ukraine).