of the period. It was therefore during this time that other sites rose to regional prominence and were able to exert greater interregional influence, including Caracol, Copán, Palenque, and Calakmul (which was allied with Caracol and may have assisted in the defeat of Tikal), and Dos Pilas Aguateca and Cancuén in the Petexbatún region of Guatemala. Around 710, Tikal arose again and started to build strong alliances and defeat its worst enemies. In the Maya area, the Late Classic ended with the so-called "Maya collapse", a transitional period coupling the general depopulation of the southern lowlands and development and florescence of centers in the northern lowlands. Terminal Classic Generally applied to the Maya area, the Terminal Classic roughly spans the time between c. 800/850 and c. 1000 AD. Overall, it generally correlates with the rise to prominence of Puuc settlements in the northern Maya lowlands, so named after the hills where they are mainly found. Puuc settlements are specifically associated with a unique architectural style (the "Puuc architectural style") that represents a technological departure from previous construction techniques. Major Puuc sites include Uxmal, Sayil, Labna, Kabah, and Oxkintok. While generally concentrated within the area in and around the Puuc hills, the style has been documented as far away as at Chichen Itza to the east and Edzna to the south. Chichén Itzá was originally thought to have been a Postclassic site in the northern Maya lowlands. Research over the past few decades has established that it was first settled during the Early/Late Classic transition but rose to prominence during the Terminal Classic and Early Postclassic. During its apogee, this widely known site economically and politically dominated the northern lowlands. Its participation in the circum-peninsular exchange route, possible through its port site of Isla Cerritos, allowed Chichén Itzá to remain highly connected to areas such as central Mexico and Central America. The apparent "Mexicanization" of architecture at Chichén Itzá led past researchers to believe that Chichén Itzá existed under the control of a Toltec empire. Chronological data refutes this early interpretation, and it is now known that Chichén Itzá predated the Toltec; Mexican architectural styles are now used as an indicator of strong economic and ideological ties between the two regions. Postclassic The Postclassic (beginning 900–1000 CE, depending on area) is, like the Late Classic, characterized by the cyclical crystallization and fragmentation of various polities. The main Maya centers were located