:"They say that Tartessus is a river in the land of the Iberians, running down into the sea by two mouths, and that between these two mouths lies a city of the same name. The river, which is the largest in Iberia, and tidal, those of a later day called Baetis, and there are some who think that Tartessus was the ancient name of Carpia, a city of the Iberians."
According to Pytheas in the 4th century BC as reported by Strabo in the 1st century AD they occupied the area that was Tartessos which was the Baetis River valley (Guadalquivir River Andalusia Spain).
Baetis | Battle of the Upper Baetis | Battle of the Baetis River |