In February 1918, a similar organisation was formed in the German-held Greater Poland. It was modelled after the original PMO and maintained contacts with her predecessor. It assumed the name of "Polish Military Organisation of the Prussian Partition" and its main aim was to liberate the region and attach it to Poland. The members of the PMO became the core of the Greater Polish Army during the Greater Poland Uprising of 1918-1919. After the uprising succeeded, the PMO members were also drafted into the Polish Army, together with other military units fighting in the Uprising.