Swedish War of Liberation: Swedish troops defeat a Danish force in the Battle of Västerås.

The Swedish War of Liberation, also known as Gustav Vasa's Rebellion and the Swedish War of Secession, was a significant historical event in Sweden. Gustav Vasa, a nobleman, led a rebellion and civil war against King Christian II. The war resulted in the deposition of King Christian II from the throne of Sweden, effectively ending the Kalmar Union that had united Sweden, Norway, and Denmark.