These Huns, a Mongol race, had migrated from the center of Asia westward three-quarters of a century previously (A. D. 375), carrying death and devastation on their path. They had nothing in common with the peoples of the West, either in facial features or habits of life. Contemporary historians describe them as surpassing by their savagery all that can be imagined. They were of low stature, with broad shoulders, thick-set limbs, flat noses, high cheek-bones, small eyes deeply sunk in the sockets, and yellow complexion. Ammianus Marcellinus compares them, in their monstrous ugliness, to beasts walking on two legs, or the grinning heads clumsily carved on the posts of bridges. They had no beard, because from infancy their faces were hideously scarred by being slashed all over, in order to hinder its growth. Accustomed to lead a wandering life in their native country, these wild hordes traversed the Steppes, or boundless plains which lie between Russia and China, in huge chariots, or on small hardy horses, changing their stations as often as fresh pasture was required for their cattle. Except constrained by necessity, they never entered any kind of house, holding them in horror as so many tombs. They were accustomed from infancy to endure cold, hunger, and thirst. As the great boots they wore deprived them of all facility in marching, they never fought on foot; but the skill with which they managed their horses and threw the javelin, made them more formidable to the Germans than even the disciplined, but less ferocious, legions of Rome. This was the rude race which, bursting into Europe in the second half of the fourth century, shook the whole barbarian world to its center, and precipitated it upon the Roman Empire. The Goths fled before them, when they passed the Danube, the Vandals when they crossed the Rhine. After a halt of half a century in the center of Europe, the Huns put themselves again in motion.