Kalmar Union
The Engelbrekt rebellion ("Engelbrektsupproret") was an uprising during 1434–1436 led by Swedish miner and nobleman Engelbrekt Engelbrektsson and directed against Eric of Pomerania, the king of the Kalmar Union. The uprising, with its center in Dalarna and Bergslagen, spread throughout Svealand and Götaland. The rebellion caused erosion within the unity of the Kalmar Union, leading to the temporary expulsion of Danish forces from Sweden.