It is impossible in the space at our disposal to trace the movements of all the various German and Slavonic tribes as they went to and fro in the disorganized empire in search of plunder and a pleasant home. But let the Vandals serve as an example. They came into history in east Germany. They settled as we have told in Pannonia. Thence they moved somewhen about 425 A.D. through the intervening provinces to Spain. There they found Visigoths from South Russia and other German tribes setting up dukes and kings. From Spain the Vandals under Genseric sailed for North Africa (429), captured Carthage (439), and built a fleet. They secured the mastery of the sea and captured and pillaged Rome (455), which had recovered very imperfectly from her capture and looting by Alaric half a century earlier. Then the Vandals made themselves masters of Sicily, Corsica, Sardinia and most of the other islands of the western Mediterranean. They made, in fact, a sea empire very similar in its extent to the sea empire of Carthage seven hundred odd years before. They were at the climax of their power about 477. They were a mere handful of conquerors holding all this country. In the next century almost all their territory had been reconquered for the empire of Constantinople during a transitory blaze of energy under Justinian I.
The story of the Vandals is but one sample of a host of similar adventures. But now there was coming into the European world the least kindred and most redoubtable of all these devastators, the Mongolian Huns or Tartars, a yellow people active and able, such as the western world had never before encountered.