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
Pêro Escobar Pêro Escobar Pedro Escobar, also known as Pêro Escobar, was a 15th-century Portuguese navigator who discovered São Tomé (December 21, 1471), Annobon (January 1, 1472), Príncipe (January 17, 1472) islands, together with João de Santarém c. 1470. He is then recorded sailing with Diogo Cão on his first voyage in 1482, and as the pilot of the famous Bérrio caravel on Vasco da Gama’s first expedition in 1497 to sail directly from Europe to India. He was also on Pedro Álvares Cabral’s discovery of Brazil in 1500. In 1471, working in the service of Lisbon merchant Fernão Gomes, who had