Phocis continued to put up resistance to Thessaly right the way through the 6th century. Historians of later antiquity relate that Phocis was governed for a period by a Thessalian governor. His murder in the course of a revolt caused the intervention of the Thessalian army, which was in the end defeated by a force led by two chieftains from Phocis and the prophet Tellias. What is clear is that in the second half of the 6th century the Thessalians were doing their best to gain a good foothold in central Hellas. In the context of this policy, they upheld the power of Pisistratus tyrant of Athens and his sons, one of whom was actually called Thessalus. A little after 510 B.C., when there was a Spartan landing at Phalerum, the then haven of Athens, with the object of expelling the Pisistratids, they were defeated by the Thessalian cavalry, led by the tagos Cineas. A second Spartan body, however, led by king Cleomenes, defeated the Thessalians, and they were compelled to withdraw. But possibly the victories of Boeotia and Phocis came a little later, because at that time many of the Boeotian cities coalesce into a League under the leadership of Thebes.