The Greater Poland Uprising was a military conflict that took place from December 1918 to July 1919. It aimed to liberate the region of Greater Poland from German control after World War I. The uprising was initiated by Polish nationalists and was part of a broader movement to establish an independent Polish state. The conflict resulted in significant battles between Polish forces and the German army. Ultimately, the uprising was successful, leading to the incorporation of Greater Poland into the newly re-established Second Polish Republic. The event is celebrated in Poland as a symbol of national unity and independence.