We now come to that section of the eastern theatre of the war which received the least extended notice in printed reports—the barred doorway between Europe and Asia—the Caucasus. Not because the fighting there was less furious, but because the region was less accessible to war correspondents. The struggle was in fact quite as bloody and even more savage and barbarous here than elsewhere, for on this front Russ meets Turk, Christian meets Moslem, and where they grapple the veneer of chivalry blisters off.

Here again, as in Galicia, we come to a natural frontier, not only between two races, but between two continents. For here, crossing the isthmus between the Black Sea and the Caspian, stretches a mountain range over seven hundred miles in length, rising abruptly out of the plains on either side. These are the Caucasus Mountains, forming the boundary between Europe and Asia.

The higher and central part of the range (which averages only from sixty to seventy miles in width) is formed of parallel ridges, not separated by deep and wide valleys, but remarkably connected by elevated plateaus, which are traversed by narrow fissures of extreme depth. The highest peaks are in the most central chain; Mt. Elburz, attaining an elevation of 18,000 feet above the sea, while Mt. Kasbeck reaches a height of more than 16,000 feet, and several other peaks rise above the line of perpetual snow. The outlying spurs and foothills of this chain of lofty mountains are of less extent and importance than those of almost any other mountain range of similar magnitude, subsiding, as they do, until they are only 200 feet high along the shores of the Black Sea. Some parts are almost entirely bare, but other parts are densely wooded and the secondary ranges near the Black Sea are covered by magnificent forests of oak, beech, ash, maple, and walnut.

This range is an almost impassable wall across the narrow isthmus which joins Europe and Asia, and the Gorge of Dariel is the gateway in this wall through which have come almost all the migrating races that have peopled the continent of Europe. As is well known, the white peoples of Europe have been classified as the Caucasian race, because they were all supposed to have passed through this gateway originally. Apparently each of these oncoming waves of barbaric humanity, bursting through the great gateway, must have left behind some few remnants of their volume, for nowhere in the world, in so limited an area, is there such a diversity and mixture of peoples. In the words of one writer, who speaks with authority on this region, the Caucasus is "an ethnological museum where the invaders of Europe, as they traveled westward to be manufactured into nations, left behind samples of themselves in their raw condition."

Here may be found the Georgians, who so long championed the Cross against the Crescent, the wild Lesghians from the highlands of Daghestan; the Circassians, famed for the beauty of their women; Suanetians, Ossets, Abkhasians, Mingrelians, not to enumerate dozens of other tribes and races, each speaking its own tongue. It is said that over a hundred languages are spoken throughout this region; seventy in the city of Tiflis alone.

The scenery of the mountains themselves is unparalleled in grandeur except by the Himalayas and offers many a virgin peak to the ambitious mountain climber. Here may be found the ibex, the stag, the wild boar, the wild bull and an infinite variety of feathered game. The animal life of the mountains has, in fact, become more abundant of late years on account of the high charges for hunting licenses fixed by the Russian Government. Wolves are so plentiful that in severe winters they descend to the lowlands in great packs and rob the flocks before the very eyes of the shepherds.

The most important mineral resources of the region are the oil wells; here, in fact, around Batum, are situated some of the most important oil fields in the world. Of manganese ore, an essential of the steel industry, the Caucasus furnishes half of the world's supply, which is exported from the two ports of Poti and Batum. Its mineral wealth seems to be practically unlimited, copper, zinc, iron, tin, and many other metals being found throughout the region, in most cases in exceedingly rich deposits. The agricultural resources are not so important, especially from a military point of view, though vast quantities of sheep are raised in the highlands in the spring and summer, the flocks being driven down into the plains to the south in winter.

One of the outstanding features of Russian occupation is the great Georgian military road which has been built across the mountains of recent years and maintained by the Government. Its engineering is masterly; here and there it passes close to or under vast overhanging lumps of mountainside. Everywhere the greatest care has been taken of this most important military highway, Russia's avenue into that country she coveted and fought for so long. Beginning at Vladikavkaz, it runs through Balta, Lars, thence through the famous Gorge of Dariel, the "Circassian Gates," the dark and awful defile between Europe and Asia. The gorge is what the geologists call a "fault," for it is not really a pass over the mountain chain, but a rent clear across it. Seventy years ago it was almost impassable for avalanches or the sudden outbursts of pent-up glacial streams swept it from end to end, but the Russians have spent over $20,000,000 on it and made it safe. In 1877, during the Russo-Turkish War, nearly all the troops and stores for carrying the war into Turkey and Asia came by this road.

Its importance has since been lessened to a certain degree, for there is now direct railway communication from Moscow to Baku, at one end of the Trans-Caucasian Railway, and therefore to Kars itself, via Tiflis; and equally from Batum to Kars at the other end to which military steamers can bring troops and supplies from Odessa and Novorossik in the Black Sea.

The most important city in this region is Tiflis, the "city of seventy languages." It may, indeed, be called the modern Babel. As seen from the mountains, it lies at the bottom of a brown, treeless valley, between steep hills, on either side of the River Kura.