Wanderlust World Wanderlust World During the Age of Exploration, Spain and Portugal clashed over territorial claims in the Americas, Africa, and Asia. Both sought exclusive rights to newly "discovered" lands, leading to frequent disputes.
To mediate, Pope Alexander VI brokered the Treaty of Tordesillas, dividing the world along a north-south meridian 370 leagues west of the Cape Verde islands. Lands west went to Spain; east to Portugal. However, imprecise longitude measurements and vague terms caused ongoing disagreements.
In South America, the line cut through present-day Brazil, leading to Portuguese expansion westward (bandeirantes) and Spanish claims from the west, creating tension in regions like the Río de la Plata basin.
In the Indian Ocean and Southeast Asia, both powers competed for the spice trade, establishing rival forts and factories, often clashing with local rulers and each other.
Beyond colonies, they vied for control of sea lanes, access to markets, and precious metal flows, fueling naval arms races and privateering.
Spain's staunch Catholicism contrasted with Portugal's more diverse religious landscape. Dynastic unions (e.g., 1580–1640 Iberian Union) and succession crises further complicated relations.
Even in Iberia, the exact border was contested, resulting in occasional skirmishes.
As Dutch, English, and French power rose in the 17th–18th centuries, Spanish and Portuguese influence waned, leading to more diplomatic cooperation.