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
1471 Papal conclave by voting for others until the morning of August 9th, when along with d'Estouteville and Barbo they changed their votes to della Rovere in the "accessus", giving him a total of 13 votes. The cardinals voting for della Rovere in the scrutiny were: Monferrato, Zeno, Michiel, Agnifilo, Roverella,Forteguerri, Bessarion, Calandrini, and Orsini. Contrary to the perennial tradition, the five remaining cardinals did not change their votes to della Rovere in the "accessus" to make the election "unanimous". 1471 Papal conclave The papal conclave of 1471 (August 6–9) elected Pope Sixtus IV following the death of Pope Paul II. With the