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Yaxun Bʼahlam IV, also called Bird Jaguar IV, was a Mayan king from Yaxchilan. He ruled from 752 until 768 AD, continuing the period of prosperity started by his father Itzamnaaj Bʼahlam III. He had to struggle to take and hold power, as he was not perceived to be the rightful heir to the throne.
Yaxchilan is an ancient Maya city located on the bank of the Usumacinta River in the state of Chiapas, Mexico. In the Late Classic Period Yaxchilan was one of the most powerful Maya states along the course of the Usumacinta River, with Piedras Negras as its major rival. Architectural styles in subordinate sites in the Usumacinta region demonstrate clear differences that mark a clear boundary between the two kingdoms.
Chiapas, officially the Free and Sovereign State of Chiapas, is one of the states that make up the 32 federal entities of Mexico. It comprises 124 municipalities as of September 2017 and its capital and largest city is Tuxtla Gutiérrez. Other important population centers in Chiapas include Ocosingo, Tapachula, San Cristóbal de las Casas, Comitán, and Arriaga. Chiapas is the southernmost state in Mexico, and it borders the states of Oaxaca to the west, Veracruz to the northwest, and Tabasco to the north, and the Petén, Quiché, Huehuetenango, and San Marcos departments of Guatemala to the east and southeast. Chiapas has a significant coastline on the Pacific Ocean to the southwest.