6 Dec 1519
As Brazil was Portuguese territory, Magellan avoided it and on December 13 anchored near present-day Rio de Janeiro. There the crew was resupplied, but bad conditions caused them to delay. Afterwards, they continued to sail south along South America's east coast, looking for the strait that Magellan believed would lead to the Spice Islands. The fleet reached Río de la Plata on January 10, 1520.