in 1450, Isabella met in secret with a long lost childhood friend of hers, Augusto. they were married the next day. the Kingdoms of Castile, Aragon, and Portugal had met in Madrid to lay their plans for defeating the last Muslim Kingdom in Iberia, Granada. the three kingdoms pooled their resources together and had decided that the lands would be split amongst themselves.
in 1455, Portugal began its blockade of Granada and bombarded their cities and shipping lanes. Aragon and Castile invaded full force. within months, the Emirate had collapsed. Granada ceased to exist as a nation of its own. Isabella an Ferdinand had met privately to split the territory amongst themselves... angered, Alfonso delcared War on their old ally.
by 1458, the Castilian-Portugese War had ended. Portugal ceded their claims in Granada to Castile whilst Castile ceded the territory of Galacia. Hispania was finally at peace. in 1459, Isabella, Ferdinand, and Alfonso met once again in Madrid to discuss the future of Hispania, and the world. collectively, they decided that the old trade routes with India were too long, cumbersome, expensive, and unprotected. they looked for a quicker route to reach the Indies and gain access to trade.
in 1460, they signed the Iberian Colonial Treaty. which stated that they would colonized the "uncivilized" world from the rest of the barbarians and muslims. they agreed that they would do everything in their power to protect their shipping lanes. and the best way to do so was to establish outposts and colonies throughout the rest of Africa and Asia.