We have already, in our first account of Chinese beginnings, noted the existence of these Huns. It is necessary now to explain briefly who and what they were. Even in using this word Hun as a general equivalent for the Hiung-nu, we step on to controversial ground. In our accounts of the development of the Western world we have had occasion to name the Scythians, and to explain the difficulty of distinguishing clearly between Cimmerians, Sarmatians, Medes, Persians, Parthians, Goths, and other more or less nomadic, more or less Aryan peoples who drifted to and fro in a great arc between the Danube and Central Asia. While sections of the Aryans were moving south and acquiring and developing civilization, these other Aryan peoples were developing mobility and nomadism; they were learning the life of the tent, the wagon, and the herd. They were learning also to use milk as a food basis, and were probably becoming less agricultural, less disposed to take even snatch crops, than they had been. Their development was being aided by a slow change in climate that was replacing the swamps and forests and parklands of South Russia and Central Asia by steppes, by wide grazing lands that is, which favoured a healthy, unsettled life, and necessitated an annual movement between summer and winter pasture. These peoples had only the lowest political forms; they split up, they mingled together; the various races had identical social habits; and so it is that the difficulty, the impossibility of sharp distinctions between them arises. Now the case of the Mongolian races to the north and north-west of the Chinese civilization is very parallel. There can be little doubt that the Hiung-nu, the Huns, and the later people called the Mongols, were all very much the same people, and that the Turks and Tartars presently branched off from this same drifting Mongolian population. Kalmucks and Buriats are later developments of the same strain. Here we shall favour the use of the word “Hun” as a sort of general term for these tribes, just as we have been free and wide in our use of “Scythian” in the West.
The consolidation of China was a very serious matter for these Hunnish peoples. Hitherto their overflow of population had gone adventuring southward into the disorders of divided China as water goes into a sponge. Now they found a wall built against them, a firm government, and disciplined armies cutting them off from the grass plains. And though the wall held them back, it did not hold back the Chinese. They were increasing and multiplying through these centuries of peace, and as they increased and multiplied, they spread steadily with house and plough wherever the soil permitted. They spread westward into Tibet and northward and north-westwardly, perhaps to the edge of the Gobi desert. They spread into the homes and pasturing and hunting-grounds of the Hunnish nomads, exactly as the white people of the United States spread westward into the hunting-grounds of the Red Indians. And in spite of raid and massacre they were just as invincible because they had the pressure of numbers and a strong avenging government behind them. Even without the latter support the cultivating civilization of China has enormous powers of permeation and extension. It has spread slowly and continuously for three thousand years. It is spreading in Manchuria and Siberia to-day. It roots deeply where it spreads.
Partly the Huns were civilized and assimilated by the Chinese. The more northerly Huns were checked and their super-abundant energies were turned westward. The southern Huns were merged into the imperial population.
If the reader will examine the map of Central Asia, he will see that very great mountain barriers separate the Southern, Western, and Eastern peoples of Asia. (But he should be wary of forming his ideas from a map upon Mercator’s projection, which enormously exaggerates the areas and distances of Northern Asia and Siberia.) He will find that from the central mountain masses three great mountain systems radiate eastward; the Himalayas going south-eastward, south of Tibet, the Kuen Lun eastward, north of Tibet, and the Thien Shan north-eastward to join the Altai mountains. Further to the north is the great plain, still steadily thawing and drying. Between the Thien Shan and the Kuen Lun is an area, the Tarim Basin (= roughly Eastern Turkestan), of rivers that never reach the sea, but end in swamps and intermittent lakes. This basin was much more fertile in the past than it is now. The mountain barrier to the west of this Tarim Basin is high, but not forbidding; there are many practicable routes downward into Western Turkestan, and it is possible to travel either along the northern foothills of the Kuen Lun or by the Tarim valley westward from China to Kashgar (where the roads converge), and so over the mountains to Kokand, Samarkand, and Bokhara. Here then is the natural meeting-place in history of Aryan and Mongolian. Here or round by the sea.
We have already noted how Alexander the Great came to one side of the barrier in 329 B.C. High among the mountains of Turkestan a lake preserves his name. Indeed, so living is the tradition of his great raid, that almost any stone ruin in Central Asia is still ascribed to “Iskander.” After this brief glimpse, the light of history upon this region fades again, and when it becomes bright once more it is on the eastern and not upon the western side. Far away to the east Shi-Hwang-ti had routed the Huns and walled them out of China proper. A portion of these people remained in the north of China, a remnant which was destined to amalgamate with Chinese life under the Hans, but a considerable section had turned westward and (second and first centuries B.C.) driven before them a kindred people called the Yueh-Chi, driving them from the eastern to the western extremity of the Kuen Lun, and at last right over the barrier into the once Aryan region of Western Turkestan.[264] These Yueh-Chi conquered the slightly Hellenized kingdom of Bactria, and mixed with Aryan people there. Later on these Yueh-Chi became, or were merged with Aryan elements into, a people called the Indo-Scythians, who went on down the Khyber Pass and conquered northern portions of India as far as Benares (100-150 A.D.), wiping out the last vestiges of Hellenic rule in India. This big splash over of the Mongolian races westward was probably not the first of such splashes, but it is the first recorded splash. In the rear of the Yueh-Chi were the Huns, and in the rear of the Huns and turning them now northward was the vigorous Han Dynasty of China. In the reign of the greatest of the Han monarchs, Wu-Ti (140-86 B.C.), the Huns had been driven northward out of the whole of Eastern Turkestan or subjugated, the Tarim Basin swarmed with Chinese settlers, and caravans were going over westward with silk and lacquer and jade to trade for the gold and silver of Armenia and Rome.