Castilian Civil War

Castilian Civil War

:"For the other conflict sometimes called the 'Castilian Civil War,' see War of the Castilian Succession."Infobox Military Conflict
conflict=The First Castilian Civil War

caption=Battle of Nájera, from a fifteenth-century manuscript, the English and Pedro are on the right.
date=1366 to 1369
result= Victory for Henry of Trastámara
combatant2=Forces of Henry of Trastámara; France; Crown of Aragon
commander1=Pedro of Castile
Edward, the Black Prince
John of Gaunt
commander2=Henry of Trastámara
Charles V of France
Bertrand du Guesclin
The First Castilian Civil War [For the second, see War of the Castilian Succession.] lasted three years from 1366 to 1369. It became part of the larger conflict then raging between the Kingdom of England and the Kingdom of France: the Hundred Years' War. It was fought primarily in the Kingdom of Castile and its coastal waters between the local and allied forces of the reigning king, Peter, and his illegitimate brother Henry of Trastámara over the right to the crown.


Peter was called by his supporters "The Just" and by his detractors "The Cruel". To the higher ranks of the nobility, he was a tyrant, forcing the royal will on hitherto free men. He had greatly extended the royal authority and had entered into a war with Aragon (called "The War of the Two Peters").

His illegitimate brother Henry quickly obtained the support of not only the upper noblesse, but France, Aragon, and the Papacy. In 1366, he officially deposed his brother as king of Castile, León, Toledo, and Seville and had himself proclaimed king in the monastery of Las Huelgas.


In 1366, Henry, then living in France, assembled a large army, with both French and Aragonese components and English mercenaries, at Montpellier and invaded Castile with the support of the kings of France and Aragon (Charles V and Peter IV respectively). He successfully forced Peter to flee.

Peter fled to Bayonne, a city in English-held Gascony. There, he petitioned Edward, the Black Prince, for aid and, in exchange for lands in Castile, received it. With English troops led by the prince, he returned to Castile and reasserted his royal power in 1367, forcing Henry to return to France after the successful Battle of Nájera (Navarette). He refused, however, to make good on his dealings with the English and his allies, including the Prince of Wales himself, soon left. In 1368, Henry and Charles of France signed the Treaty of Toledo whereby the Castilians lent a fleet in the Bay of Biscay to the French in return for military aid on land.

Henry reentered Castile in 1369 and murdered Peter at the Battle of Campo de Montiel. He was acclaimed Henry II and immediately solidified his rule by removing Jews from high office. Castile became, at this time, a stern ally of the French in their ongoing wars.



*Wintle, Justin. "The Rough Guide History of Spain". Penguin Group, 2003.

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