Henry II of Castile

Henry of Trastamara defeated the forces of Peter I at the Battle of Montiel. After the battle, Henry captured and killed Peter, ending the First Castilian Civil War and securing his claim to the throne.

Henry of Trastamara was crowned King of Castile after killing his half-brother Peter I. His coronation established the Trastamara dynasty, which would rule Castile and later Aragon for the next century.

Henry II formed a lasting alliance with France, supporting French interests in the Hundred Years' War against England. This alliance provided Castile with French military support and strengthened the Franco-Castilian axis.

Henry II redistributed lands and titles to his supporters, creating a new nobility loyal to the Trastamara dynasty. These reforms strengthened royal authority but also entrenched the power of the new noble class.