On August 13, the first day of the battle, there was a violent assault of two Soviet divisions, which fought on Warsaw from the north-east. The Soviets broke the defense of the 11th Division of Colonel Bolesaw Jazwinski and captured Radzymin. Then one of them headed for Prague and the other one turned right Nieporet and Jablonna. A dramatic fight started under Radzymin.

August 15 concentric attack of Polish divisions (10th Division of General Zeligowski and 1st Division of Lithuanian-Byelorussian General Jan Rzadkowski), after all-day fierce battles, finally brought success. Radzymin was recovered and Polish troops returned to positions lost two days ago.

August 16 at dawn started a Polish blow from the Wieprza, It completely changed the operating system on the front of Warsaw. Excellent position of the Western Front so far to assault the city on the task of defeating the Poles became a position of a lethal threat.
