After the defeat of the coastal cities by the Greeks (4th century BC), Tuscania also became a maritime trade centre through the port of Regas (next to today's Montalto di Castro). There is no record of Tuscania being involved in the battles that led to the Roman conquest of the Etruscan northern Lazio (280 BC), as the city probably entered into the Roman orbit peacefully. The agricultural development and construction of the Via Clodia further boosted the economic situation of the city.