1425 Alvaro de Luna, the king’s favourite, made constable of Castile.
1427 The nobles, jealous of his unbounded influence, league against him. He is exiled, but soon recalled.
1429 New league against Alvaro. The kings of Navarre and Aragon invade Castile.
1431 Battle of Higueruela and the defeat of the Moors by De Luna. His vigorous rule brings prosperity to Castile.
1439 New league against De Luna, and civil war in which the kings of Aragon and Navarre join,
1445 but are defeated by Juan in the battle of Olmedo.
1453 The king, prompted by his second wife Isabella of Portugal, resolves on De Luna’s death. He is seized, tried, and executed.
1454 Henry (IV) the Impotent. His extravagance and neglect provoke the barons to unite against him and, after several unsuccessful attempts, compel him to set aside the infanta Juana, called La Beltraneja, and recognise his brother Alfonso as his heir.
1465 Not content with this, at a solemn ceremony on the plain of Avila, they declare Henry deposed and set up Alfonso as king.
1468 A destructive civil war continues till Alfonso’s death (1468), when his sister Isabella (the Catholic) refuses to take his place, and contents herself with recognition as Henry’s heiress.