Writing of the city of Nysa, Arrian says that "it was built by Dionysos or Bacchus, when he conquered the Indians; but who this Bacchus was, or at what time or from whence he conquered the Indians is hard to determine, whether he was that Theban who from Thebes, or he who from Timolus, a mountain of Lydia, undertook that famous expedition into India is very uncertain." There is a Greek epic poem in hexameter verse, called the "Dionysiaka," or "Bassarika," which tells of the conquest of India by Bacchus, the greatest of all his achievements. The author is Nonnus of Panopolis in Egypt, who wrote about the beginning of the fifth century of our era. Bacchus is said to have received a command from Zeus to turn back the Indians, who had extended their conquests to the Mediterranean, and in the execution of this command he marched through Syria and Assyria. In Assyria he was entertained with magnificent hospitality. Nothing further is said of the route he took to reach India. The first battle which took place in India was on the banks of the Hydaspes, where the Indians were routed. Then followed as an incident in the war the destruction of the Indian fleet in a naval battle, which is instructive. It took the assistance of the goddess of war, Pallas Athene, to bring the campaign to a conclusion, which terminated with the death of the Indian leader Deriades. Here, then, is crystallized in verse the tradition to which Arrian refers, and remembering that we are indebted to two great epics of India, the "Ramayana" and the "Mahabharata," for such glimmering of the ancient history of the Aryan occupation of India as we possess, we may very well conceive that the germs of real historical fact lie half-concealed in this poem of Nonnus. However that may be, it is tolerably certain that Alexander found a people in Northern India who claimed a Greek origin when he arrived there, quite apart from the colonists of Baktria who had been transported there by Darius Hydaspes, and that he recognized their claim to distant relationship.
When Alexander, then, mustered his army in the sunny fields of Macedon he was preparing for an expedition over no uncertain ways between Greece and Baktria or Arachosia (Northern and Western Afghanistan). He knew what lay before him if he could once break through the Persian barrier; and the strength of that barrier he must have been well aware lay as much in the stern fighting qualities of the mercenary Greek legions in the pay of Persia as in the hosts of Persian and Indian troops which the Persian monarch could array against him. We have lists of the component forces on both sides. The Macedonian legions were homogeneous and patriotic. The Persian army was partly European, but chiefly Asiatic, with a mixed company of Asiatic troops such as has probably never taken the field since. The opposing forces, indeed, partook of the nature of the two armies which fought out the issue of the Russo-Japanese campaign, and the result was much the same. There was no tie of national sentiment to bind together the unwieldy cohorts of Persia. They fought for their pay, and they fought well; but when big battalions are divided in religious sentiment and unswayed by patriotism, they are no match for Macedonian cohesion, Mahomedan Jehad, or Japanese Bushido.
It is quite interesting to examine the details of Alexander's army. The main body consisted of six brigades of 3000 men, each united to form an irresistible phalanx. Heavily armoured, with a long shield, a long sword, and a four-and-twenty foot spear (sarina), the infantryman of the phalanx must have possessed a powerful physique to enable him to carry himself and his weapons in the field. The depth of the phalanx was sixteen ranks, and the first six ranks were so placed that they could all bring their spears into action at once. The bulk of the phalanx consisted of Macedonians only. The light infantry, bowmen, and dartsmen numbered about 6000. A third corps of 6000 men more lightly armed, but with longer swords than the phalangists (called Hypaspists), were intermediate. The cavalry consisted of three classes, light, heavy, and medium, 3000 Macedonian and Thessalian horsemen, heavily armoured, forming its main strength. The light cavalry were Thracian lancers. The Royal Horse Guard included eight Macedonian squadrons of horsemen picked from the best families in Greece. It is useful to note that there were mounted infantry and artillery (i.e. balistai and katapeltai) with the force. More useful still to note that none of Alexander's victories were won by the solid strength of his phalanx; it was the sweeping and resistless force of his cavalry charges (often led by himself) that gained them.
Perhaps the most notable feature about this Greek expedition to India was the fact that it was the first military expedition of which there is any record which included scientific inquiry as one of its objects. Alexander had on his personal staff men of literary if not of scientific acquirements, and it is to them doubtless that we owe a comparatively clear account of the expedition, although unfortunately their records have only been transmitted to us by later authors. If we could but recover originals what a host of doubtful points might be cleared up! It is true that previous to the date of Alexander one man of genius, Xenophon, had kept a record of a magnificent military achievement, and had proved himself to be master of literature as he was of the science of leading; but Xenophon stands alone, and it may be doubted whether, during the many centuries which have passed away since the era of Greek supremacy, any practical leader of men has ever attained such a splendid position in the ranks of writers of military history. Alexander appears, at any rate, to have been no historian, but his staff of cultivated literary assistants and men of letters included many notable Greek names.
Alexander crossed the Hellespont in the spring of the year 334 B.C., and first encountered the Persians near the Granikos River. The battle was decisive although the losses on either side do not appear to have been heavy. It was but the augury of what was to follow. The subsequent advance of the Macedonian troops southward through the lovely land of Iona, and the reduction of Miletus and Helikarnassos, brought the first year's campaign to a close. The second year opened with the conquest of Pamphyllia and Phrygia, the passage of the Tauros ranges being made in winter. On the return of spring he recrossed the Tauros and reduced the western hill-tribes of Kilikia. Part of his force, meanwhile, had occupied the passes into Syria known as the Syrian gates. Within two days march of the Syrian gates the Persian hosts again were massed in an open plain under Darius, who had advanced from the east, waiting to fall upon the Macedonian troops and crush them as they debouched from the defile. Tired of waiting, however, Darius moved forward into Kilikia by the Amanian passes to look for Alexander, and thus it happened that when Alexander finally emerged from the Syrian gates into the plains of Syria he found his enemy behind him. He partially retraced his steps and regained the pass by midnight, and there from one of the adjoining summits he "beheld the Persian watch-fires gleaming far and wide over the plain of Issos." The rapidity of Alexander's movements was only equalled by the fierce energy of his onslaught when he led his cavalry against the unwieldy formations of his Persian enemy. It was his own hand that gained the victory both then and afterwards.
There is no more stirring story in all history than this progress of the Macedonian force. Step by step it has been traced out from Granikos to Issos and from Issos to Arbela; but this is not the place to recapitulate that part of the story which applies only to Western Asia. It is not until after the final decisive battle at Arbela, when Darius fled in hot haste along the south-eastern road to Ecbatana, the former capital of Media, and thence in the spring of 330 B.C. retreated with a disorganized force and an intriguing court towards Baktria, where he hoped to find a refuge with his kinsman Bessos the satrap of that province, that we really touch on the subject with which we wish to deal in this book, viz. the high-roads to Afghanistan in those long past days. Alexander, meanwhile, had received the submission of Babylon and restored the temple of Belus, and made himself master of a more spacious empire than the world had yet seen. It was then that the amazing results of his military success began to turn his head. From this point the severe simplicity of the Macedonian soldier is exchanged for the luxury, arrogance, and intolerance of the despot and conqueror. As Alexander advanced in material strength so did he slide down the easy descent of moral retrogression, and whilst we can still admire his magnificence as a military leader we find little else left to admire about him. From Babylon to the lovely valley wherein lies Susa, and from Susa to Persepolis, was more or less of a triumphal march in spite of the fierce opposition of the satrap Artobaizanes. Of Persepolis we are taught to believe that Alexander left nothing behind him but blackened ruins—the result of a drunken orgy. During the winter, amidst snow and ice, he subdued the Mardians in their mountain fastnesses (for he never left an active foe on the flank or rear), and with the return of the sweet Persian spring he renewed his hunt after Darius, turning his face to the north and east.
There are two high-roads through Persia to the East—one leading to Northern Afghanistan and the Oxus regions over Mashad, the other to Kirman, Seistan, and Kandahar. Along both of them there now runs a telegraph line connecting with the Russian system via Mashad, and the Indian system via Kirman. They must always have been high-roads—the great trade routes to Central Asia and India. Where the orderly line of telegraph poles now stretches in unending regularity to mark the dusty highway, there, through more ages than we can count, the padded foot of the camel must have worn the road into ridges and ruts as he plodded his weary way with loads of merchandise and fodder. No geological evolution can have disturbed those tracks since the Assyrian kings first drew riches from the East and started colonies on the Baktrian highlands; they are now as they were 1000 years before Christ, and it is only natural that in the ordinary course of the same unresting spirit of enterprise the telegraph posts will sooner or later cast long shadows over a passing railway. The desert regions of Persia separate these two roads: the wide flat spaces of sand or "Kavir"; an unending procession of sand-hills on the glittering fields of salt-bound swamp. The desert is crossable—it has been fairly well exploited—but nothing so far has been found in it to justify the expectation of great discoveries of dead and buried cities, or traces of a former civilization such as once occupied the deserts of Chinese Turkistan.
We may well believe that the central deserts of Persia were the same in Alexander's time as they are in ours. Consequently any large company of people would have been more or less forced into one or other of the well-known routes which the geographical configuration of the country presented to them. In his pursuit of Darius Alexander followed the northern route to Baktria which strikes a little north of east from Ecbatana (Hamadan), and in these days leads direct to Tehran the modern capital of Persia. The tragical fate of Darius, and Alexander's crocodile grief thereat, belongs to another story. It is only when he touches the regions beyond Mashad that he figures as one of the earliest explorers of Afghanistan, and certainly the earliest of whom we have any certain record. Unfortunately these records say very little of the nature of those cities and centres of human life which he found on the Afghan border; nor is there any definite allusion to be found in the writings of Alexander's historians to the colonial occupation of Afghanistan which must have preceded the Persian conquests. We have seen that Assyrian influence was strongly and continuously felt in India for many centuries after the consolidation of the Second Assyrian Empire, and the probability that between the Tigris and the Oxus there must have been intercommunication from the earliest days of the rise of Assyrian power.
There is one ragged and time-worn city in Afghan Turkistan which certainly belongs to the centuries preceding the era of Alexander—it was the capital of Baktria, the city of Bessos, and it has been a great centre of commerce, a city of pilgrimage, Buddhist and Mahomedan, for many a century since. This is Balkh, traditionally known as the "Mother of cities," whose foundation is variously ascribed to Nimrud, or to "Karomurs the Persian Romulus," Assyrian or Persian as the fancy strikes the narrator. Of its extreme antiquity there can be no doubt. It is certain that at a very early date it was the rival of Ecbatana, of Nineveh, and of Babylon. Bricks with inscriptions are said to have been found there some seventy years ago, and similar bricks should certainly be there still. Officers of the Russo-Afghan Boundary Commission passed through modern Balkh in 1884, but no such bricks were found during the very cursory and entirely superficial examination which was all that could be made of the place; square bricks, without inscription, of the size and quality of those which may any day be dug out of the Birs Nimrud at Babylon were certainly found, and point to a similarity of construction in a part of the ancient walls, which is surely not accidental. Modern Balkh consists of about 500 houses of Afghan settlers, a colony of Jews, and a small bazaar set in the midst of a waste of ruins and many acres of debris. The walls of the city are 6½ or 7 miles in perimeter; in some places they are supported by a rampart like the walls of Herat. These, of course, are modern, as is the fort and citadel, or Bala Hissar, which stands on a mound to the north-east. The green cupola of the Masjid Sabz and the arched entrance to the ruined Madrasa testify to modern Mahomedan occupation, as do the Top-i-Rustam and the Takht-i-Rustam (two ancient topes) to the fervour of religious zeal with which its Buddhist inhabitants invested it in the early centuries of our era. Balkh awaits its Layard, and not only Balkh, for there are mounds and ruins innumerable scattered through the breadth of the Balkh plain.
As one approaches Balkh by the Akcha road from the west, one looks anxiously around for some outward signs of its extreme antiquity. They are not altogether wanting, but time and the mellowing hand of Nature have rounded off the edges of the mounds of debris which lie scattered over miles of the surrounding country, brushing them over with the fresh green of vegetation, and leaving no sign by which to judge of the age of them. It is difficult in this part of Asia to get back farther than the age of the great destroyer Chenghiz Khan. His time has passed by long enough to leave but little evidence that the hand of the destroyer was his hand; but probably nothing visible on the surface dates back further than the six centuries which have come and gone since his Mongol hordes were set loose. Beyond these surface ruins and below them there must be cities arranged, as it were, in underground flats, one piled on another, strata below strata, till we reach the debris of the pre-Semitic days of Western and Central Asia, when the Turanian races who supplied Arcadian civilization to Mesopotamia peopled the land. Just as we cannot tell exactly when Babylon first became a city, so are we confounded by the age of Balkh. Babylon belongs to the time when myths were grouped around the adventures of a solar hero. Ultimately, however, the Ca-dimissa of the Accad became the Bab-ili (the "gate of God") of the Semite. It was always the "gate of God," but whether the presiding deity was always the Accadian Merodach seems doubtful. Fourteen or fifteen centuries before Christ there was probably a Balkh as there was a Babylon; and from time immemorial and a date unreckoned Balkh and Babylon must have been the two great commercial centres of Asia. What a history to dig out when its time shall come!