Before European settlement of North America, Arkansas, was inhabited by indigenous peoples for thousands of years. The Caddo, Osage, and Quapaw peoples encountered European explorers. The first of these Europeans was Spanish explorer Hernando de Soto in 1541, who crossed the Mississippi and marched across central Arkansas and the Ozark Mountains. After finding nothing he considered of value and encountering native resistance the entire way, he and his men returned to the Mississippi River where de Soto fell ill. From his deathbed he ordered his men to massacre all the men of the nearby village of Anilco, who he feared had been plotting with a powerful polity down the Mississippi River, "Quigualtam". His men obeyed and did not stop with the men, but were said to have massacred women and children as well. He died the following day in what is believed to be the vicinity of modern-day McArthur, Arkansas, in May 1542. His body was weighted down with sand and he was consigned to a watery grave in the Mississippi River under cover of darkness by his men. De Soto had attempted to deceive the native population into thinking he was an immortal deity, sun of the sun, in order to forestall attack by outraged Native Americans on his by then weakened and bedraggled army. In order to keep the ruse up, his men informed the locals that de Soto had ascended into the sky. His will at the time of his death listed "four Indian slaves, three horses and 700 hogs" which were auctioned off. The starving men, who had been living off maize stolen from natives, immediately started butchering the hogs and later, commanded by former aide-de-camp Moscoso, attempted an overland return to Mexico. They made it as far as Texas before running into territory too dry for maize farming and too thinly populated to sustain themselves by stealing food from the locals. The expedition promptly backtracked to Arkansas. After building a small fleet of boats they then headed down the Mississippi River and eventually on to Mexico by water.