Following Christopher Columbus's establishment of permanent settlements in the Caribbean, the Spanish authorized expeditions for the discovery, conquest, and colonization of new territory. In 1519, Spanish conquistadors waged a military campaign against the Aztec Empire. The campaign culminated in the fall of Tenochtitlan, after a coalition force made up of conquistadors and indigenous tribes that rivaled the Aztecs, captured the city. Subsequent campaigns of conquest were undertaken by Spanish in the Yucatán, and Guatemala. Indigenous resistance and conflicts against the authorities of the Viceroyalty of New Spain (present-day Central America and Mexico), and its succeeding governments continued to occur intermittently. These wars are collectively referred to as the Mexican Indian Wars.