The Treaty of Tordesillas established in 1494 divided territory outside Europe between Spain and Portugal along a meridian 370 leagues west of the Cape Verde islands. King Ferdinand and Queen Isabella of Spain and King John II of Portugal agreed on the demarcation line to settle conflicting claims and prevent disputes over newly discovered lands in the Americas and Africa. However, the treaty lacked specifics about which island marked the starting point of the 370 leagues or the exact length of the league unit of measurement.