The document summarizes the expansion of Portugal and Spain in the 15th and early 16th centuries. It describes how Portugal developed as a major sea power under Henry the Navigator and Bartholomeu Dias, who rounded the Cape of Good Hope in 1487. Spain consolidated under Ferdinand and Isabella after 1492, and used this unity to fund Christopher Columbus' expedition west in 1492, hoping to find a route to India but instead discovering the Americas. This led to further Spanish and Portuguese exploration and colonization of the new world.