Atrato River
The first mainland explorations were followed by a phase of inland expeditions and conquest. The Spanish crown extended the Reconquista effort, completed in Spain in 1492, to non-Catholic people in new territories. In 1502 on the coast of present-day Colombia, near the Gulf of Urabá, Spanish explorers led by Vasco Núñez de Balboa explored and conquered the area near the Atrato River.