Kammala jumla mai zuwa: Bayan ƙarshen Greater Poland Uprising an sake fasalin rukunin, an ƙarfafa shi da HMGs kuma an cire shi daga aiki. Ya shiga cikin karɓar garin Wieleń daga gwamnatin Jamus a ranar 17 ga Janairu, 1920. An sake sake masa suna, a wannan karon zuwa "1st Reserve Regiment", an haɗa shi cikin Sojojin Poland kuma an tura shi zuwa gaban Yakin Poland-Bolshevik. Kusan an hallaka shi a lokacin
Yaƙin Grodno, an karfafa shi da Lt. Lisewski ya sake shiga yaƙi a lokacin Yaƙin Kogin Niemen, bayan haka aka janye shi zuwa filin horo a Biedrusko. Bayan tsagaita wuta da sanya hannu kan yarjejeniyar zaman lafiya ta Riga, an tura rundunar zuwa Lubliniec a ranar 26 ga Yuni, 1922.