The Achaeans of north Greece, which was later to be called Thessaly, seem to have been the great sea-adventurers of the heroic age. With this country were connected the memories of early Greek exploration of the Euxine, in the legend of the ship Argo. And to the Achaeans of Thessaly we must probably refer the earliest notice which preserves the Achaean name in a historical document. An Egyptian writing tells us that they came in company with other peoples "from the lands of the sea" and invaded Egypt in the year 1229 B. C., when Memptah was king. But the great achievement which made the Achaeans illustrious was one in which southern and northern Greece combined-the expedition against Troy.