Following the battles of Pułtusk and Różan, the Polish 1st Legions Infantry Division reinforced by the units of the Wyszków Operational Group arrived in the area of Mińsk Mazowiecki.
After the conflicts in Pułtusk and Różan, the Polish 1st Legion Infantry Division, bolstered by units from the Wyszków Operational Group, arrived in the vicinity of Mińsk Mazowiecki.