Both the Trojans and the Greeks were commanded by huge blond princes, the heroes of Homer—in fact, even the Gods were fair-haired—while the bulk of the armies on both sides was composed of little brunet Pelasgians, imperfectly armed and remorselessly butchered by the leaders on either side. The only common soldiers mentioned by Homer as of the same race as the heroes were the Myrmidons of Achilles. About the time that the Achæans and the Pelasgians began to amalgamate, new hordes of Nordic barbarians collectively called Hellenes entered from the northern mountains and destroyed this old Homeric-Mycenæan civilization. This Dorian invasion took place a little before 1100 B. C. and brought in the three main Nordic strains of Greece, the Dorian, the Æolian and the Ionian groups, which remain more or less distinct and separate throughout Greek history. Among these Nordics the Dorians may have included some Alpine elements. It is more than probable that this invasion or swarming of Nordics into Greece was part of the same general racial upheaval that brought the Umbrians and Oscans into Italy. Long years of intense and bitter conflict follow between the old population and the newcomers and when the turmoil of this revolution settled down classic Greece appears. What was left of the Achæans retired to the northern Peloponnesus and the survivors of the early Pelasgian population remained in Messenia serving as helots their Spartan masters. The Greek colonies in Asia Minor were founded largely by refugees fleeing from these Dorian invaders. The Pelasgian strain seems to have persisted best in Attica and the Ionian states. The Dorian Spartans appear to have retained more of the character of the northern barbarians than the Ionian Greeks but the splendid civilization of Hellas was due to a fusion of the two elements, the Achæan and Hellene of Nordic and the Pelasgian of Mediterranean race. The contrast between Dorian Sparta and Ionian Athens, between the military efficiency, thorough organization and sacrifice of the citizen for the welfare of the state, which constituted the basis of Lacedæmonian power, and the Attic brilliancy, instability and extreme development of individualism, is strikingly like the contrast between Prussia with its Spartan-like culture and France with its Athenian versatility. To this mixture of races in classic Greece the Mediterranean Pelasgians contributed their Mycenæan culture and the Nordic Achæans and Hellenes contributed their Aryan language, fighting efficiency and the European aspect of Greek life. The first result of a crossing of two such contrasted subspecies as the Nordic and Mediterranean races has repeatedly been a new outburst of civilization. This occurs as soon as the older race has imparted to the conquerors its culture and before the victors have allowed their blood to be attenuated by mixture. This process seems to have happened several times in Greece.