Magellan Fleet Departs on Circumnavigation Voyage
Ferdinand Magellan, a Portuguese navigator in Spanish service, secured backing from King Charles I to seek a western route to the Spice Islands amid competition with Portuguese eastern routes. After months of preparation, the fleet of five ships and roughly 270 men left Seville, descended the Guadalquivir River, and finally set sail from Sanlúcar de Barrameda on September 20, 1519. The expedition crossed the Atlantic, explored South American coasts, and discovered the strait later named for Magellan. Though Magellan died in the Philippines, one ship completed the first circumnavigation and returned to Spain in 1522.
Why it matters: The voyage proved the vast extent of the Pacific Ocean and demonstrated that the world could be circumnavigated by sea, reshaping European understanding of geography and spurring further exploration and colonial competition. It established Spanish claims in the Philippines and advanced maritime technology and navigation knowledge used in subsequent centuries of global trade.