Alv's son
Knut Alvsson subsequently led an unsuccessful attempt to gain the crown of Norway. In 1500
King Hans of Denmark, Sweden and Norway made an ill-fated attempt to
conquer the Ditmarshes (
Dithmarschen) in Northern Germany. Knut Alvsson, who had married the granddaughter of Karl Knutsson, and was involved with the Swedish Independence Party, concluded it was time to act. His
rebellion began in 1501 in Sweden, but soon came to
Båhus Fortress in Norway on the Swedish-Norwegian border, which
Henrich Krummedige commanded. Krummedige held his fief at Båhus, but Alvsson captured Akershus Fortress in March 1502, although the citizens of Oslo remained pro-Danish while the nobles and bishops of the country remained neutral—presumably waiting to see which side prevailed. King Hans dispatched his son Christian (later crowned King
Christian II of Denmark and Norway) at the head of forces; they relieved the siege of Båhus Fortress, and then captured and reduced
Älvsborg Fortress across the river from Båhus Fortress in
Gothenburg,
Sweden. Krummedige then led forces north to finish off the rebellion by recapturing
Tønsberg Fortress and invested Akershus Fortress, which Alvsson was defending. When it became clear that the rebellion had failed, Alvsson came on board one of Krummedige's ships under a safe conduct. Krummedige killed Knut Alvsson, either by treachery or, as alleged, in response to Alvsson's own violence. Alvsson was judged a traitor and Alvsson's property was forfeit to the crown. Krummedige had prevailed, although he was compelled to leave Norway and the uprising was not totally quelled until 1504. This ended the male
Tre Rosor line in Norway and the feud. == Aftermath ==