February 20, 1846
The Kraków uprising begins, with Polish insurgents capturing Kraków, capital of the Free, Independent, and Strictly Neutral City of Kraków with its Territory.
February 21, 1440
FIfty-three nobles and clergy and nineteen cities proclaim the Prussian Confederation against the Teutonic Order. This was based on the Lizard Union, a similar organization formed in 1397.