The Battle of Sparrsätra, fought between the forces of King Eric XI of Sweden and rebels led by Holmger Knutsson, took place in 1247 near Enköping in Sweden. It occurred during a poorly documented period in Swedish history; as a result, many details are uncertain and conjectural. Although it was not the end of the Folkung rebellion, many scholars consider it to have marked the end of the old order, leading to the Uppland Swedes' loss of their semi-aristocratic status, and to the beginning of taxation by the King. Background Since pre-historic times the Swedes of Uppland had elected the king of Sweden, and their responsibility towards him lay not in paying taxes, but in providing warriors and ships for the leidang organization. Many scholars consider the reasons for the battle to have been the abolition of the leidang organization and its replacement with monetary taxes. The people of Uppland also appear to have refused to pay tithes to the church. The Geats of Västergötland had begun to pay tithes in the late 12th century, a decision taken independently of the Swedes. It is not known if the Geats had ever had any leidang organization, but they had accepted paying taxes, a system which provided a more stable basis of power for the King. The main source for what was at stake during the battle is the Annals of Sigtuna, which relates that at Sparrsätra, in 1247, the rural community of Uppland lost its freedom and was charged with paying taxes, including taxes on grain production and the right of laying up a ship: The archaeologist Mats G. Larsson has commented that it is hardly surprising that such fundamental changes in the structure of society would meet fierce resistance. Taking part in the royal war expeditions was considered to be a natural and glorious tradition from pagan times; paying taxes to the King of Sweden, on the other hand, was likely seen as something done by defeated tributary nations - and beyond the pale for the people of Uppland. There may have been additional reasons why the battle took place in 1247. The position of jarl in Sweden had passed from old Ulf Fase to his younger and more dynamic cousin Birger Jarl. Moreover, Holmger Knutsson had come of age, and, being a son of former king Canute II of Sweden, had his own aspirations to the throne. When Ulf