 Archaeological evidence, such as burned temples and sacrificed war captives, suggests that the three societies competed against each other.At the end of the Rosario phase (700–500 BC), the valley's largest settlement San José Mogote, and a nearby settlement in the Etla valley, lost most of their population.During the same period, a new large settlement developed in the “no-man’s-land” on top of a mountain overlooking the three valleys; it was later called Monte Albán.