The second Greater Poland Uprising against Prussian forces (also under General Dąbrowski) broke out in Wielkopolska (Greater Poland) in 1806, ahead of the Prussian total defeat by Napoleon who created the Duchy of Warsaw in 1807. However, the fall of Napoleon during his Russian Campaign lead to the dismantling of the "Duchy" at the Congress of Vienna (1815) and the return of Prussian control.