After a grueling trek through dense jungle and hostile territory with about 190 Spaniards and hundreds of indigenous guides, Balboa climbed a ridge in the Darién region and became the first European recorded to gaze upon the Pacific from the New World's shores. He waded into the surf days later and formally claimed the ocean and all its coasts for the Spanish crown, opening an era of Pacific exploration and conquest.
Balboa had not set out as an explorer of oceans; he was a fugitive of sorts, having seized leadership of the troubled Spanish colony of Santa María la Antigua del Darién after its previous governor's disastrous rule. Indigenous informants told him of a great sea to the south and of a fabulously wealthy kingdom bordering it — rumors that, garbled through translation, likely referred to the Inca Empire, still undiscovered by Europeans.
The crossing took twenty-five days through mountains and swamp, with Balboa's forces fighting local warriors along the way. When his guides told him the ocean was visible from a nearby peak, he ordered his men to wait and climbed the last stretch alone, wanting to be the first European eyes to see it — a detail that made it into countless later paintings.
Four days later, in full armor with sword and banner, Balboa waded into the water and claimed the 'Mar del Sur' for Spain, along with everything it touched, an act of almost comic overreach given the ocean's actual size. He named it the South Sea; Magellan would later rename it Pacific. Balboa's discovery reshaped Spanish ambitions in the Americas, though he himself was executed in 1519 on trumped-up charges by his own father-in-law and rival, Pedro Arias Dávila.
Key people: Vasco Núñez de Balboa