The Battle of Guinea took place on the Gulf of Guinea, in western Africa, 1478, between a Portuguese fleet and a Castilian fleet in the context of the War of the Castilian Succession. The outcome of the battle of Guinea was decisive for Portugal, continuing its dominance of the atlantic ocean, and reaching a very favourable sharing of the Atlantic and territories disputed with Castile in the Peace of Alcáçovas (1479). All with the exception of the Canary Islands stayed under Portuguese control: Guinea, Cape Verde, Madeira, Azores and the exclusive right of conquering the Kingdom of Fez. Portugal also won exclusive rights over the lands discovered or that were to be discovered south of the Canary Islands.