Spain and Portugal were soon disputing each other’s claims in the New World. In 1493, Pope Alexander VI approved a borderline stretching from the North Pole to the South Pole.
It ran about 300 miles west of the Cape Verde Islands. All claims to the west of the line were ceded to Spain. Everything to the east was Portugal’s. The two countries signed the treaty on June 7, 1494.
In 1506, the Portuguese declared that the treaty was unfair, and the line was moved about 1,000 miles west of Cape Verde, allowing the Portuguese to found a colony in Brazil, South America. None of the other seafaring countries, England, France, Sweden, or Holland, recognized the treaty.