Tamarindito is thought to have been the capital of a ruling lineage in the Early Classic Petexbatún, it got subjugated in the Late Classic by the new kingdom that had established itself at Dos Pilas. On a stela from Arroyo de Piedra, we can see ruler Chak Bin Ahk designated as a lord subordinate to Dos Pilas. The rivalry between Dos Pilas and Tamarindito may not only have been about regional hegemony, but Tamarindito had close ties to Tikal, the adversary of Dos Pilas, during the Middle Classic. Tamarindito is a moderate sized site with more than 140 structures, six stelae, seven panels, two altars, a ballcourt for the Mesoamerican ballgame and three hieroglyphic staircases; one named the "Prisoner Staircase" that relates the defeat and capture of a ruler of Dos Pilas. This polity had strong links with Machaquilá to the east. The lagoon has been the object of archaeological investigations that have shown traces of occupation from the Middle Preclassic through to the Terminal Classic.