The 3rd Army fought against the Poles around Dokshytsy and Parafyanovo (June–July), and participated in the July operation 1920. During the Battle of Warsaw (1920), if fought on the Central Front between Kock and Brody. In September, it was fought in the area of Druskininkai and Ashmyany, and was defeated in the Battle of the Niemen River. In November–December, it acted against the Bulak-Balakhovich detachments in Belarus.