The Red Army eventually advanced deep into Ukraine and Belarus, and the embattled Ukrainian People's Republic sought military help from Poland to repel the invasion. The joint Polish-Ukrainian armies initially successfully captured the Ukrainian capital, Kyiv, but eventually had to retreat following a massive counteroffensive by the Red Army, culminating in the Polish–Soviet War of 1920. Following the Polish victory upon the Battle of Warsaw, the Soviets sued for peace and the war ended with an armistice in October 1920.
The Red Army eventually penetrated deep into Ukraine and Belarus, and the beleaguered Ukrainian People's Republic sought military aid from Poland to repel the invasion. The combined Polish-Ukrainian forces initially successfully captured the Ukrainian capital, Kyiv, but ultimately had to retreat after a massive counterattack by the Red Army, leading to the Polish–Soviet War of 1920. Following the Polish victory at the Battle of Warsaw, the Soviets sought peace and the war ended with an armistice in October 1920.