Teos was the second ruler of the Thirtieth Dynasty and was the son of his predecessor, Nectanebo I. After his father had died, Teos took over the throne and planned an attack on the Persians. He had the help of mercenaries from Greece, but his own generals disagreed with his leadership and the entire event was a fiasco. He was deserted by both the Greeks and the Egyptians. He fled to Persia by way of Arabia and Artaxerxes II, the ruler of Persia, gave him refuge. He lived in Persia until his death.