All the Aryan peoples have had their heroic age, the achievements of which form the basis of later saga. For the Germans this was the period of the Migrations, as it is called, in round numbers the two hundred years from 400 to 600, at the close of which we find them settled in those regions which they have, generally speaking, occupied ever since. During these two centuries kaleidoscopic changes had been taking place in the position of the various Germanic tribes. Impelled partly by a native love of wandering, partly by the pressure of hostile peoples of other race, they moved with astonishing rapidity hither and thither over the face of Europe, generally in conflict with one another or buffeted by the Romans in the west and south, and by the Huns in the east. In this stern struggle for existence and search for a permanent place of settlement some of them even perished utterly; amid the changing fortunes of all of them deeds were performed that fixed themselves in the memory of the whole people, great victories or great disasters became the subject of story and song. We need only to recall such names as those of Ermanric and Theodoric to remind ourselves what an important part was played by the Germanic peoples of that Migration Period in the history of Europe. During it a national consciousness was engendered, and in it we have the faint beginnings of a national literature. Germanic saga rests almost entirely upon the events of these two centuries, the fifth and sixth. Although we get glimpses of the Germans during the four or five preceding centuries, none of the historic characters of those earlier times have been preserved in the national sagas. With these sagas based on history, however, have been mingled in most cases primeval Germanic myths, possessions of the people from prehistoric times. A most conspicuous example of this union of mythical and originally historical elements is the Nibelungen saga, out of which grew in course of time the great national epic, the Nibelungenlied.