[1] On April 2, Polish-Lithuanian forces besieged Uman, where Bohun organised a defense.

Polish-Lithuanian forces viewed Uman as the "nest of rebellion" which they sought to eliminate in order to acquire full control.

[2] Polish-Lithuanian forces attempted to lure Bohun and his Cossacks out of the fortress in order to "negotiate" with them, but they ignored this request.

[4] Nonethless, all Polish-Lithuanian attacks were repelled after heavy fighting and Uman remained in Cossack hands.

[1] On April 4, Polish-Lithuanian army lifted the siege and retreated after the news of incoming Cossack reinforcements.