of the Itza, the Xiús and Cocomes) was formed, which eventually disintegrated circa 1194, giving way to a period of anarchy and fragmentation into small domains which the Spanish conquistadors found in the 16th century. Exploration by Spanish soldiers In 1513, Juan Ponce de León had already conquered the island of Borinquén (now Puerto Rico) and had discovered Florida. Antón de Alaminos, who was with Ponce de León on this latest discovery, suspected that west of Cuba they could find new land. Under their influence, Diego Velázquez de Cuéllar, supported by the governor of Cuba, organized an expedition commanded by Francisco Hernández de Córdoba to explore the seas west of the island. This expedition sailed from port of Ajaruco on February 8, 1517, to La Habana and after circling the island and sailing southwest by what is now known as the Yucatán Channel, the expedition made landfall at the Yucatán Peninsula on March 1. There are discrepancies about where the first explorers arrived. Some say it was in Isla Mujeres. Bernal Díaz del Castillo places it at Cabo Catoche where they saw a great city which they named the «Gran Cairo». Spanish conquest The conquest of Yucatán was completed two decades after the Spanish conquest of the Aztec Empire; by Francisco de Montejo "el Adelantado", his son Francisco de Montejo y León "el Mozo" and his nephew, Francisco de Montejo "el Sobrino". El Adelantado was in the expedition of Juan de Grijalva and was with Hernán Cortés in the third expedition that eventually became the Conquest of the Aztec Empire. He was subsequently appointed for the conquest of the Maya of Yucatán, but failed in his first attempt in 1527–28. In 1529 he was appointed Governor of Tabasco, with the order to pacify Tabasco and conquer Yucatán and Cozumel. From Tabasco, Montejo led a new campaign to Yucatán from the west (1531–35) and failed again in his attempt for conquest. Circa 1535, after many bloody battles with the natives, he reached the complete pacification of the Province of Tabasco and began planning his new foray to Yucatán. El Adelantado was appointed governor of Honduras and then of Chiapas. Therefore, he gave his son "El Mozo", the mission to consummate the conquest of Yucatán. Francisco de Montejo y León "el Mozo" founded the cities of San Francisco de Campeche on October 4, 1540, and Mérida on January 6, 1542 (in honor