To the east of these German tribes were the Slavs, a people no better civilized, but not so warlike in their nature. As the Germans, in later years, moved on to the west, the Slavs, in turn, moved westward and occupied much of the land which had been left vacant by the Germans. [Illustration: A Hun Warrior] The inhabitants of western Europe, that is, France, Spain, and the British Isles, were largely Celts. In fact, all Europe could be said to be divided up among four great peoples: There were the Latins in Italy, the Celts in western Europe, the Germans in central Europe, and the Slavs to the east. All of these four families were distantly related, as can be proved by the languages which they spoke. The Greeks, while not belonging to any one of the four, were also distant cousins of both Germans and Latins. Probably all five peoples are descended from one big family of tribes. In addition to these, there were, from time to time invasions of Europe by other nations which did not have any connection by blood with Celts, Latins, Greeks, Germans, or Slavs. For instance, the ferocious Huns, a people of the yellow race, rushed into Europe about 400 A.D., but were beaten in a big battle by the Romans and Germans and finally went back to Asia. Three hundred years later, a great horde of Moors and Arabs from Africa crossed over into Europe by way of the Straits of Gibraltar, and at one time threatened to sweep before them all the Christian nations. For several hundred years after this, they held the southern part of Spain, but were finally driven out.