During this time Mayapan worked cooperatively with Uxmal and also Chichen Itza, which by this point had entered its decline.

[2] One party, led by Ah Xiu Xupan and assisted by mercenaries from elsewhere in Pre-Columbian Mexico, killed all members of the Cocom in Mayapan.

Archaeological excavations have shown evidence of burnt structures, ceremonial deposits and human bones from this period.

The leading families of Mayapan left to found new settlements and Yucatán fragmented into 18 petty kingdoms.

[5] The first ambassadors from the Xiu met with Spanish conquistador Francisco de Montejo the Younger at Tuchi-caan, around 1539.