stelae were commissioned by the king. Yuknoom Che'en II was probably responsible for the construction of the palace complexes that form a major part of the site core. Calakmul and Dos Pilas In 629 Tikal had founded Dos Pilas in the Petexbatún region, some to its southwest, as a military outpost in order to control trade along the course of the Pasión River. B'alaj Chan K'awiil was installed on the throne of the new outpost at the age of four, in 635, and for many years served as a loyal vassal fighting for his brother, the king of Tikal. In AD 648 Calakmul attacked Dos Pilas and gained an overwhelming victory that included the death of a Tikal lord. B'alaj Chan K'awiil was captured by Yuknoom Che'en II but, instead of being sacrificed, he was re-instated on his throne as a vassal of the Calakmul king, and went on to attack Tikal in 657, forcing Nuun Ujol Chaak, the then king of Tikal, to temporarily abandon the city. The first two rulers of Dos Pilas continued to use the Mutal emblem glyph of Tikal, and they probably felt that they had a legitimate claim to the throne of Tikal itself. For some reason, B'alaj Chan K'awiil was not installed as the new ruler of Tikal; instead he stayed at Dos Pilas. Tikal counterattacked against Dos Pilas in 672, driving B'alaj Chan K'awiil into an exile that lasted five years. Calakmul tried to encircle Tikal within an area dominated by its allies, such as El Peru, Dos Pilas and Caracol. In 677 Calakmul counterattacked against Dos Pilas, driving Tikal out and reinstalled B'alaj Chan K'awiil on his throne. In 679 Dos Pilas, probably aided by Calakmul, gained an important victory over Tikal, with a hieroglyphic description of the battle describing pools of blood and piles of heads. Troubles continued in the east, with renewed conflict between Naranjo and Caracol. Naranjo completely defeated Caracol in 680 but Naranjo's dynasty disappeared within two years and a daughter of B'alaj Chan K'awiil founded a new dynasty there in 682, indicating that Calakmul had probably intervened decisively to place a loyal vassal on the throne. The patronage of Yuknoom Che'en II as overlord is recorded at a range of important cities, including El Peru where he oversaw the installation of K'inich B'alam as king and strengthened the tie with the marriage of a Calakmul princess