After he pacified Hispaniola, where the native Indians had revolted against the administration of governor Nicolás de Ovando, Diego Velázquez de Cuéllar led the conquest of Cuba in 1511 under orders from Viceroy Diego Columbus and was appointed governor of the island. As governor he authorized expeditions to explore lands further west, including the 1517 Francisco Hernández de Córdoba expedition to Yucatán. Diego Velázquez, ordered expeditions, one led by his nephew, Juan de Grijalva, to Yucatán and the Hernán Cortés expedition of 1519. He initially backed Cortés's expedition to Mexico, but because of his personal enmity for Cortés later ordered Pánfilo de Narváez to arrest him. Grijalva was sent out with four ships and some 240 men.