Pedro el Cruel (Pedro the Cruel) or Pedro el Justiciero (Pedro the Just, Son of King Alfonso XI of Castilla, Pedro gained the throne at sixteen years old upon his father's death. Six years later he was embroiled in the "War of the Two Peters" with the king of Aragon, which was followed immediately by the Castilian Civil War with his half-brother, Enrique de Trastamara, who deposed him for the first time in 1366. In exile he found his way to the court of Edward The Black Prince in Aquitaine and leveraged his long standing treaty with the English to restore him to the throne at the head of an Anglo-Gascon army, which was accomplished thanks to victory at the Battle of Najera. He was deposed again and subsequently murdered by his half-brother in 1369 after losing the Battle of Montiel. During his reigns he was accused of several murders, including that of his first wife, Blanche of Bourbon, and excommunicated by Pope Urban V, all of which helped to earn him the moniker "the cruel." Later historians have attempted to rehabilitate his reputation pointing to his contemporary moniker "the executor of justice," though there is no evidence of his enemies using that name.