On 12 September 1920, Polish forces withdrawn from the Battle of the Niemen under General Władysław Sikorski started a successful offensive on Soviet-held Volhynia. Pressed from all directions, the 1st Cavalry Army lost Równe on 18 September and was forced to retreat further eastwards. By the end of September, the Polish forces reached the Słucza River, near the lines held by the Soviets before their offensive towards Warsaw started. Soon afterwards, Budyonny's Army had to be withdrawn from the front, not to return until after the cease fire that October.