Ukraine’s new army chief, Oleksandr Syrsky, faces five major challenges as he takes over at a critical moment in the war. Ukraine’s allies, particularly the US and EU, are struggling to provide aid packages to support Ukraine’s defense against Russia. The Ukrainian military and political leadership are divided on how to replenish the army’s ranks. Ukraine’s failed counteroffensive last summer has made it difficult to entrench and hold back Russian forces. Controlling Ukraine’s airspace is a priority, but securing ammunition for air defense systems is an issue. Syrsky also faces low public recognition and a reputation for indifference to military casualties.