Portuguese navigator Ferdinand Magellan sets sail from Spain in an effort to find a western sea route to the rich Spice Islands of Indonesia. In command of five ships and 270 men, Magellan sailed to West Africa and then to Brazil, where he searched the South American coast for a strait that would take him to the Pacific. He searched the Río de la Plata, a large estuary south of Brazil, for a way through; failing, he continued south along the coast of Patagonia. At the end of March 1520, the expedition set up winter quarters at Port St. Julian. On Easter day at midnight, the Spanish captains mutinied against their Portuguese captain, but Magellan crushed the revolt, executing one of the captains and leaving another ashore when his ship left St. Julian in August.