More successful was the Greater Poland Uprising of 1806, which led to the region's becoming part of the Napoleonic Duchy of Warsaw (forming the Poznań Department and parts of the Kalisz and Bydgoszcz Departments). However, following the Congress of Vienna in 1815, Greater Poland was again partitioned, with the western part (including Poznań) going to Prussia. The eastern part joined the Russian-controlled Kingdom of Poland, where it formed the Kalisz Voivodeship until 1837, then the Kalisz Governorate (merged into the Warsaw Governorate between 1844 and 1867).