The Pawnee and their French allies surround and defeat the Villasur expedition, painted on buffalo hides.[a]
In the first part of the 18th century, French explorers and fur traders began to enter the plains west of the Missouri River, which they claimed as Louisiana. In 1714, Étienne de Veniard, Sieur de Bourgmont became the first colonial explorer known to have reached the mouth of the Platte River, although other French traders may have visited the area and lived among the Indians. Spain had claimed ownership of the Great Plains since the Coronado expedition of the 16th century, but became worried about the growing French influence in the region. In 1718, the War of the Quadruple Alliance broke out between France and Spain.