Infantes of Aragon

In July 1420, Infante Henry engineered a coup in Tordesillas, dispossessed opposing nobles and seized effective control of Castilian government.

But by 1427, Álvaro de Luna had fallen out of the king's favor, and Infante Henry returned to Castile and recovered much of his old powers.

The Infantes had the support of the high Castilian nobility, and, of course, Aragon and Navarre, but the Constable knit a coalition of smaller nobles and burghers against them.

The protracted political and military struggles between Álvaro de Luna and the Infantes of Aragon, with its series of successes and reverses, characterized much of John II's reign.

Álvaro de Luna enjoyed a brief period of dominance, until 1454, when John II's second wife, Isabella of Portugal, secured his dismissal.