[1] The insurgents, who were led by the known Folkung Johan Filipsson, started the revolt in hopes to end the leadedship of Sweden's current King, Magnus Ladulås.

A knight who had a good relation to the Swedish king had also been killed at the castle in Jönköping.

It's also said that troops of the Folkungs attacked Norway during the period, which resulted in the Norwegians summoning their fleet.

[3][4] The rebellion is said to have ended when the king managed to lure the insurgents to the castle in Jönköping, where they were captured and later also executed in 1280.

[5] According to Erik's Chronicle, the rebellion began because King Magnus had shown affection for foreign men, and especially for his appreciation of a person named Ingemar, who is said to have married his relative.