Greater Poland Uprising (1806)

The Greater Poland uprising of 1806 was a Polish military insurrection which occurred in the region of Wielkopolska, also known as Greater Poland, against the occupying Prussian forces after the Partitions of the Polish–Lithuanian Commonwealth (1772–1795). The uprising was organized by General Jan Henryk Dąbrowski to help advancing French forces under Napoleon in liberating Poland from Prussian occupation.

Source: Wikipedia — Greater Poland Uprising (1806) (CC BY-SA 4.0)