Wars of the Roses the Hundred Years' War, unfolding the structural problems of feudalism, combined with the mental infirmity and weak rule of King Henry VI which revived interest in Richard of York's claim to the throne. Historians disagree on which of these factors to identify as the main reason for the wars. With the Duke of York's death, the claim transferred to his heir, Edward, who later became the first Yorkist king of England, as Edward IV. He reigned from 1461, interrupted by a Lancastrian uprising and reinstallment of Henry VI in 1470 to 1471, until his sudden death in 1483. His son
Ture Turesson (Bielke) leaving for Kalmar Castle which he still held as Castellan. This brought him away from the centre of Swedish politics; he continued to fight Charles Canutesson's supporters in Småland and remained loyal to King Christian. In 1466 the Archbishop was replaced by Erik Axelsson Tott as Regent of Sweden, who openly aligned himself with Charles Canutesson's supporters, and in 1467 Charles Canutesson returned as King for a third time. The death of Charles Canutesson in 1470 did not bring an end to the conflict. The new separatist leader Sten Sture the Elder besieged Kalmar Castle briefly in 1471, but was