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
Cham–Vietnamese War (1471) Cham–Vietnamese War (1471) The Cham-Đại Việt War of 1471 began when Emperor Lê Thánh Tông of Đại Việt launched a military expedition that is widely regarded as an event that marked the downfall of Champa. The Đại Việt forces attacked and sacked the kingdom's capital Vijaya, and decimated the Cham army. As a result of the conflict, Champa was forced to cede territory to Annam and ceased to pose a threat to Annamese territory since then. The Cham and the Đại Việt had had a history of conflict. In the course of their wars, peace often came with economic exhaustion