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.

[5] When the Portuguese fleet of eleven ships arrived at the Gulf of Guinea, the Castilians were already in the area for about two months trading with the Africans.

Cheap goods like shells, old clothes, brass bracelets, and other items were being traded in exchange for gold,[5] while slave raids along the coast of Guinea were also being conducted.

The large amount of gold captured by the Portuguese was enough to finance King Afonso's military campaign in Castile.

[6] In the following year, the Treaty of Alcáçovas was signed between Portugal and Castile, where King Afonso V of Portugal gave up his claim to the Castilian throne, recognizing the Catholic Monarchs as sovereigns of Castile and abandoning his claim to the Canary Islands, while Queen Isabella I of Castile recognized the Portuguese hegemony in the Atlantic Ocean, confirming Portuguese sovereignty over Madeira, Azores, the Cape Verde Islands and the: