Polish Fourth Army, commanded by General Leonard Skierski defeated Soviet forces in the area of Kobryn (present-day Belarus).

After the Battle of Warsaw, the Fourth Army was in early September 1920 transported eastwards, to guard the front along the rail line Bialystok – Brzesc nad Bugiem – Wlodawa.

The enemy captured a bridge over the Mukhavets River, and then attacked the Polish 57th Infantry Regiment.

were forced to retreat, but on the next day, after reinforcements had been brought, Polish soldiers recaptured the lost territory.

The battle is commemorated on the Tomb of the Unknown Soldier, Warsaw, with the inscription "KOBRYN 14 – 15 IX 1920".