Dano-Swedish War (1501–1512) participant Sweden
The Dano-Swedish War from 1501 to 1512 was a military conflict between Denmark and Sweden within the Kalmar Union.
The war began with a Swedish and a Norwegian revolt against King Hans and the siege of Queen Christina in her castle in Danish-held Stockholm.1501 to 1504
On 1 January 1501, Swedish Regent Sten Sture the Elder and the Swedish National Council met in Vadstena Castle, at which the council approved the revolt against King Hans, and  declared the deposition of the king. Norwegian nobel Knut Alvsson was also there and directed harsh accusations against King Hans' control in Norway and was provided Swedish support for his return to Norway. 
Sten Sture besieged Tre Kronor Castle in Stockholm from September 1501 until 6 May 1502. The kings wife, Queen Christina was the commander of the castle. This was one of the hardest sieges known during the Kalmar Union, during which a garrison of 1000 men was reduced to 70 out of plague and starvation. In August 1501 a Swedish army took Örebro.
Knut Alvsson led at the same time Swedish forces in an attack on Båhus Fortress on the Swedish-Norwegian border. The fort was commanded by Henrich Krummedige. Krummedige was able to hold Båhus, but Alvsson captured Akershus Fortress and Tønsberg Fortress in March 1502.
King Hans dispatched his son Christian (later crowned King Christian II of Denmark and Norway) at the head of Danish forces; they relieved the siege of Båhus Fortress, and also captured Älvsborg Fortress across the river from Båhus Fortress. Krummedige then led forces north to finish off the rebellion by recapturing Tønsberg Fortress and investing Akershus Fortress, which Alvsson was defending.
When it became clear that the rebellion was stalemated, Alvsson came on board one of Krummedige's ships under a safe conduct. Krummedige's men killed Alvsson on 18 August 1502, either by treachery or, as alleged by Krummedige's men, in response to Alvsson's own violence. Breaking the rules of safe conduct was considered a grave treachery after the old Norse laws, which were still used in Norway at the time. However, the court in Oslo deemed Krummedige to have acted justly. The conditions for this judgement have been discussed by historians for years. Sten Sture invaded Norway in 1503, but failed to accomplish anything of importance. Nils Ravaldsson became the new leader of the rebellion, but it was crushed in December 1504, at Olsborg Castle.