Wars of the Roses a "sudden narrowing in the direct line of descent" near the end of his reign. His eldest son, Edward, the Black Prince, had died the year before. Edward III was succeeded on the throne by the Black Prince's only surviving son Richard II, who was only 10 years old. Richard's claim to the throne was based on the principle that the son of an elder brother had priority in the succession over his uncles. Since Richard was a minor, had no siblings, and had three living uncles at the time of Edward III's death, there was considerable uncertainty about who
Edward the Black Prince the Battle of Nájera. However, after a wait of several months, during which he failed to obtain either the province of Biscay or liquidation of the debt from Don Pedro, he returned to Aquitaine. Prince Edward persuaded the estates of Aquitaine to allow him a hearth tax of ten sous for five years in 1368, thereby alienating the lord of Albret and other nobles. Drawn into open war with Charles V of France in 1369, he took Limoges, where in 1370 he gave orders for an indiscriminate massacre in revenge for the voluntary surrender of that town to the French