The victory of the Polish troops in the Warsaw battle in August 1920 caused a strategic blow to the Red Army and allowed the initiative of the Polish side.

August 26 Mikhail Tuchaczewski's Western Front planted the lines of rivers Niemen, Szczara and Swislocz. From the depths of Russia, reinforces was taken. Within almost a short time almost all divisions over the Vistula were recreated. Under Tuchaczewski's command, there were about 73 thousand soldiers and 220 guns. Commander-in-chief of the Red Army, Sergei Kamenev, ordered a new offensive.

Meanwhile, at the Headquarters of the Chief Commander in Brest, at the briefing of the 2nd and 4th Army Commanders, Jozef Pilsudski presented the operational assumptions of the battle plan over the Niemen and Szczara.

The main idea of the plan was to attack the main forces of the enemy in the direction of Grodno and Volkovysk. At the same time, the 2nd Army's striking group marched on a slice of Lithuanian territory and marched to the depths of the Red Army, struggling to keep the Niemen.
