Battle of Najera

The Battle of Nájera, fought on April 3, 1367, was a significant engagement during the First Castilian Civil War. This conflict pitted Peter of Castile against his illegitimate half-brother, Henry of Trastámara, who sought to claim the throne. Henry had invaded Castile with French support, but Peter secured aid from England, led by Edward, the Black Prince.12

The battle resulted in a decisive victory for Peter and the English forces, routing Henry's army and their French allies. This victory allowed Peter to temporarily regain his throne. However, the civil war continued, and Peter was eventually defeated and assassinated by Henry in 1369, leading to Henry's ascension as King Henry II of Castile and the establishment of the House of Trastámara.12