Draft:Karl Knutsson's campaign against Eric of Pomerania

Karl Knutsson's campaign against Eric of Pomerania (Swedish: Karl Knutssons kamp mot Erik av Pommern) was a successful campaign initated by Karl Knutsson against the ex-king of the Kalmar Union, Eric of Pomerania. The conflict lasted from 1439–1440.

Background
The years in the aftermath of the Engelbrekt Rebellion were very unstable in Sweden. From the Swedish perspective, they did not know exactly what to support, being whether to return to the Kalmar Union or to elect a new Swedish king. After a while, they did however decide that under all circumstances, all fortresses were to be controlled by "trustable Swedish men".

This action would require fighting with certain Swedes who were not loyal to Karl Knutsson, and Eric of Pomeranians men still held multiple castles around Sweden. The campaign against Eric would be led by Karl Knutsson.