The Spanish conquest of Chiapas was the campaign undertaken by the Spanish conquistadores against the Late Postclassic Mesoamerican polities in the territory that is now incorporated into the modern Mexican state of Chiapas. The region is physically diverse, featuring a number of highland areas, including the Sierra Madre de Chiapas and the Montañas Centrales (Central Highlands), a southern littoral plain known as Soconusco and a central depression formed by the drainage of the Grijalva River.