Carolina to the Caribbean. This was a much higher number than the number of Africans imported to the English mainland colonies during the same period. Georgia The first African slaves in what is now Georgia arrived in mid-September 1526 with Lucas Vázquez de Ayllón's establishment of San Miguel de Gualdape on the current Georgia coast. They rebelled and lived with indigenous people, destroying the colony in less than 2 months. Two centuries later, Georgia was the last of the Thirteen Colonies to be established and the furthest south (Florida was not one of the Thirteen Colonies). Founded in the 1730s, Georgia's powerful backers did not object to slavery as an institution, but their business model was to rely on labor from Britain (primarily England's poor) and they were also concerned with security, given the closeness of then Spanish Florida, and Spain's regular offers to enemy-slaves to revolt or escape. Despite agitation for slavery, it was not until a defeat of the Spanish by Georgia colonials in the 1740s that arguments for opening the colony to slavery intensified. To staff the rice plantations and settlements, Georgia's proprietors relented in 1751, and African slavery grew quickly. After becoming a royal colony, in the 1760s Georgia began importing slaves directly from Africa. Florida One African slave, Estevanico arrived with the Narváez expedition in Tampa Bay in April 1528 and marched north with the expedition until September, when they embarked on rafts from the Wakulla River, heading for Mexico. African slaves arrived again in Florida in 1539 with Hernando de Soto, and in the 1565 founding of St. Augustine, Florida. When St. Augustine, FL, was founded in 1565, the site already had enslaved Native Americans, whose ancestors had migrated from Cuba. The Spanish settlement was sparse and they held comparatively few slaves. The Spanish promised freedom to refugee slaves from the English colonies of South Carolina and Georgia in order to destabilize English settlement. If the slaves converted to Catholicism and agreed to serve in a militia for Spain, they could become Spanish citizens. By 1730 the black settlement known as Fort Mose developed near St. Augustine and was later fortified. There were two known Fort Mose sites in the eighteenth century, and the men helped defend St. Augustine against the British. It is "the only known free black town in the present-day southern United States that a European colonial government-sponsored. The Fort Mose