I le taeao o Iulai 19, 1920, na toe osofaʻia ai Novogrudok e le ʻAutau Mumu. Ina ua māeʻa le toʻilalo mataʻutia i Taua i Warsaw ma mulimuli ane i le vaitafe o Niemen
I le aso 1 o Oketopa 1920, na toe ō mai ai foʻi fitafita mai Polani i le aai. O vaega nei o le 1st ma le 5th Legions' Infantry Regiments, le 16th Infantry Regiment, ma le 3 maa o le 1st Legionary Artillery Regiment. O le toʻatele o i latou na auai i le vaega a le 1st Legions Infantry Division.