 The river formed the eastern edge of the Carthaginian territory in Sicily from the treaty with Dionysius I in 374 BCE until it was shifted west to the Platani in 339 BCE as a result of the treaty with Timoleon.In 311 BCE, the Carthaginians won a great victory over Agathocles, the Tyrant of Syracuse near the mouth of the river, where the Carthaginians had occupied the hill of Ecnomus, while Agathocles was encamped on the east bank.Around 280 BCE, the king of Agrigento, Phintias, founded a city at the mouth of the Salso, which he named Phintias after himself, requiring all the inhabitants of Gela to relocate there.