city of Tikal. The influence of Calakmul extended deep into the Petén; king Tuun K'ab' Hix of Calakmul oversaw the enthronement of Aj Wosal to the rulership of Naranjo in 546. Another vassal of Tuun K'ab' Hix was taken captive by Yaxchilan on the banks of the Usumacinta River in 537. In 561, the king now known as Sky Witness installed a ruler at the site of Los Alacranes. Sky Witness played a major part in the political events of the Maya region. He became the overlord of the city of Caracol, to the south of Naranjo, which had previously been a vassal of Tikal. In 562, according to a damaged text at Caracol, Sky Witness defeated Tikal itself and sacrificed its king Wak Chan K'awiil, thus ending his branch of the royal dynasty at Tikal. This catastrophic defeat began a 130-year hiatus for Tikal, reflecting an extended period of dominance by Calakmul. This event is used as a marker to divide the Early Classic from the Late Classic. Sky Witness is also mentioned at Okop, a site much further north in Quintana Roo. The last reference to Sky Witness occurs at Caracol and is dated to AD 572. The text is damaged but probably records the death of this powerful king. Late Classic War with Palenque Sky Witness was quickly succeeded by First Axewielder, who is mentioned in a text from Dzibanche celebrating the K'atun-ending of 573. First Axewielder ruled for about six years. In 579 Uneh Chan became king of Calakmul. Uneh Chan engaged in an aggressive campaign in the western Maya region and attacked Palenque on 23 April 599 with his ally Lakam Chak, lord of the small city of Santa Elena east of Palenque, defeating Palenque's queen Lady Yohl Ik'nal and sacking the city. The defeat is recorded on a series of hieroglyphic steps at Palenque itself and the event initiated a long-lasting grudge against Calakmul. Lady Yohl Ik'nal survived the battle and ruled for several more years, although she perhaps paid tribute to Calakmul. Uneh Chan maintained his alliances with cities in the east and he is depicted on Caracol Stela 4 supervising an event involving king Yajaw Te' K'inich of that city that occurred before 583. Calakmul again sacked Palenque on 7 April 611 under the personal direction of Uneh Chan. Palenque was now ruled by king Ajen Yohl Mat who had gained some