In the last days of May 1539 the largest and best-equipped European expedition yet seen on the Gulf coast worked its way into Tampa Bay and began putting six hundred armored men and their horses ashore. From that beachhead Hernando de Soto marched off on a four-year, four-thousand-mile rampage across the American South. It is one of the most consequential arrivals in the history of the continent, and historians have argued for more than a century about exactly where on the bay it happened.
De Soto came richer and stronger than any conqueror before him in Florida. His fleet of nine vessels, sailing from Havana, carried roughly six hundred soldiers, more than two hundred horses, herds of pigs driven along as walking rations, packs of trained war dogs, artisans, priests, and the enormous wealth he had won in the conquest of Peru. The ships felt their way through the shoals at the bay's mouth, the same treacherous entrance that Mullet Key would one day guard, and made landfall on the bay's southern or lower shore in the territory of the Uzita chiefdom, around the feast of the Holy Spirit, Pentecost, in late May. The Spanish seized a Native town to use as a base camp, and from there, after several weeks of preparation and scouting, the great column marched inland, beginning the first sustained European penetration of the interior Southeast.
The landing's most extraordinary moment came within its first days. A mounted Spanish scouting party under Baltasar de Gallegos, ranging out from the beachhead, fell upon a band of Native people and was about to ride them down when one of them threw up his arms and managed a few words of broken, half-forgotten Spanish, and the sign of the cross. He was Juan Ortiz, a young man of the earlier Narvaez expedition who had been captured near this same bay eleven years before and held captive ever since, kept alive, by the famous account, through the intercession of a chief's daughter and the protection of the chief Mocoso. Rescued and restored to his countrymen, Ortiz became de Soto's chief interpreter, an irreplaceable bridge into the Native world without which the expedition would have been blind. His story, a European saved from death at the hands of his captors by a chief's daughter, predates and uncannily prefigures the later Pocahontas legend by some eighty years, and it happened here.
What the landing has, that the Narvaez disaster largely lacked, is documentation: four separate accounts of the expedition survive. The Gentleman of Elvas, an anonymous Portuguese soldier, published his narrative in 1557; Rodrigo Rangel, de Soto's private secretary, kept the closest thing to a daily record; Luys Hernandez de Biedma, the king's factor, filed an official report in 1544; and Garcilaso de la Vega, “the Inca,” wove a vivid, literary, and less reliable account from survivors' memories decades later, published as La Florida del Inca in 1605. Together they are the foundation of everything known about the entrada, and they are exactly why its landing place cannot be fixed: they describe the bay and its approaches in terms too general to pin down, they do not fully agree, and the shoreline itself has shifted over five centuries of storms and erosion.
Generations of scholars have proposed landing sites up and down the lower bay. The most prominent candidate, marked today by the De Soto National Memorial, is near the mouth of the Manatee River at Bradenton; the historians Charles Hudson and Jerald Milanich argued instead for a site further up the bay toward Ruskin and the Little Manatee River; others have urged Piney Point and still other spots. The honest answer is that the exact beach is unknown and probably unknowable, and this archive treats any confident pinpointing of it, on a single patch of sand, as a claim that outruns the evidence. The certainty stops at “the lower shore of Tampa Bay.”
De Soto almost certainly never set foot on Mullet Key itself; the landing was on the bay, not at its mouth. Yet the fort, the park, and this whole archive carry his name, bestowed by the Army in 1900 in tribute to this 1539 arrival, and the landing is the reason the name exists at all. It is also the hinge of the bay's Native history. From this beachhead spread the soldiers, the violence, the seizures of food and labor, and above all the European diseases that would, within a few generations, help destroy the Uzita, the Tocobaga, and the other peoples who had stood on their own shore and watched de Soto's ships come in. The arrival the fort commemorates was, for the first peoples of the bay, the beginning of the end.