It is in the intermediate lands, along the vast frontier where the Empire marched on the northern _Slavonic_ lands, that the real historical geography of Germany lies for some ages. ♦Fluctuation of territory.♦ Here the boundary was ever fluctuating. ♦Extent of the Slaves.♦ At the time of the division of 887, the Slaves held all east of the Elbe and a good deal to the west. How far they had during the Wandering of the Nations stepped into the place of earlier Teutonic inhabitants is a question which belongs to another field of inquiry. We must here start from the geographical fact that, at the time when the modern states of Europe began to form themselves, the Slaves were actually in possession of the great North-Eastern region of modern Germany. Their special mention will come in their special place; we must here mark that modern Germany has largely formed itself by the gradual conquest and colonization of lands which at the end of the ninth century were Slavonic. The German kingdom spread itself far to the North-East, and German settlements and German influences spread themselves far beyond the formal bounds of the German kingdom. Three special instruments worked together in bringing about this end. The Saxon Dukes came first. In after times came the great league of German cities, the famous _Hansa_ which, like some other bodies originally commercial, became a political power, and which spread German influences over the whole of the shores of the Baltic. Along with them, from the thirteenth century onwards, worked the great military order of the Teutonic knights. Out of their conquests came the first beginnings of the Prussian state, and the extension of German rule and the German speech over much which in modern geography has become Russian. In a history of the German nation all these causes would have to be dealt with together as joint instruments towards the same end. In a purely geographical view the case is different. Some of these influences concern the formation of the actual German kingdom; others have geographically more to do with the group of powers more to the north-east, the Slavonic states of Poland and Russia, and their Lithuanian and Finnish neighbours. The growth and fall of the military orders will therefore most naturally come in another section. We have here to trace out those changes only which helped to give the German kingdom the definite geographical extent which it held for some centuries before its final fall. ♦The Saxon Mark.♦