In 1356, a rebellion erupted against Duke Bengt and King Magnus, with Magnus's eldest son
Erik Magnusson as the figurehead. On 17 October, Erik issued an open letter from
Kalmar to the inhabitants of the Diocese of Linköping, urging them to help him fight the hated Duke Bengt. Although the rebellion was also directed against King Magnus, he was not mentioned in the letter. The rebellion proceeded quickly. The army arrived in
Lund on 30 October and then proceeded to
Halland. There, they captured the
Varberg Fortress and forced Bengt into exile. Magnus was forced to give most of his realm to his son, who obtained control over Scania, southern Halland, Finland, and some other parts of Sweden. The division of the realm was formalized in Jönköping on 28 April 1357. Bengt's elder brother was also exiled, but was later allowed to return. Erik Magnusson's discontent stemmed from his lack of power. In 1355, his younger brother
Haakon was declared of age and became the sovereign ruler of Norway. Meanwhile, Erik remained powerless in Sweden, where his father continued to rule. Since Magnus was also only 39 years old, so no change was expected in the near future. Magnus's decision to appoint Bengt Algotsson as Duke of Halland and Finland only added to the resentment because the ducal title had traditionally been reserved for members of the royal house. Erik's revolt drew support from Swedish and Scanian magnates who opposed Magnus and Bengt for various political and financial reasons. He was supported by five of Sweden's seven bishops, who had guaranteed Magnus's papal loan. Tensions between the king and the clerical
frälse escalated further when Magnus abolished their tax immunity in 1352. Among Erik's supporters was also Jacob Nielsen, archbishop of Lund, whose properties Bengt had confiscated in 1356. When Erik died suddenly in 1359, Magnus regained his kingdom, but was forced to renew his oath barring Bengt from returning. Bengt Algotsson was also declared an
outlaw. Nevertheless, Bengt returned to Scania in 1360 and was killed at
Rönneholm Castle. Sixteenth-century genealogist
Rasmus Ludvigsson identified his killers as
Karl Ulfsson and Magnus Nilsson Röde. Ludvigsson recorded a legend stating that the killing was motivated by a broken betrothal to Karl's sister, Ingeborg. She was member of the
Sparre family and the daughter of
Ulf Ambjörnsson, the
Lawspeaker of
Tiohärad. Allegedly, Bengt abandoned Ingeborg after being elevated to the rank of duke.
Johannes Messenius adds that Ingeborg died of a broken heart while on a pilgrimage. However, the legend is doubtful, because Ingeborg was much older than Bengt and was already a widow. == Allegations of sodomy ==