War of the Two Peters

War of the Two Peters
Part of the Hundred Years' War
Date 1356–1375 Location Mostly towns in the Kingdom of Aragon and the Kingdom of Valencia, coast of the Principality of Catalonia Result Trastámarian victory Overthrow of Peter of Castile Accession of Henry II of Castile
Belligerents
Crown of Castile With the support of: Kingdom of England Republic of Genoa Kingdom of Portugal Kingdom of Navarre Emirate of Granada	Crown of Aragon With the support of: Henry II of Castile Kingdom of France
Commanders and leaders
Peter of Castile Edward the Black Prince John of Gaunt	Peter IV of Aragon Henry II of Castile

The War of the Two Peters (Spanish: La Guerra de los Dos Pedros, Catalan: Guerra dels dos Peres) was fought from 1356 to 1375 between the crowns of Castile and Aragon. The conflict was a struggle between two claimants to the throne of Castile, Peter of Castile and Peter IV of Aragon. The former Peter was supported by England and several English nobles led by Edward III and his son, while the latter Peter was supported by France. The conflict also brought in the involvement of the kingdoms of Navarre and Portugal. The war resulted in Aragon gaining the upper hand, but it also devastated its economy that was already reeling from the effects of the Black Death.