The Battle of Komarów, or the Zamość Ring, was one of the most important battles of the Polish-Soviet War. It took place between 30 August and 2 September 1920, near the village of Komarowo (now Komarów) near Zamość. It was the last large battle in which cavalry was used as such and not as mounted infantry. The battle ended in a disaster for the Soviet 1st Cavalry Army, which sustained heavy casualties and barely avoided being surrounded and destroyed. After the battle, the morale of the 1st Cavalry Army collapsed, and it no longer remained an effective fighting force.