THE BATTLE OF ARBELA
The position of the Persian king near Mesopotamia was chosen with great military skill. It was certain that Alexander on his return from Egypt must march northward along the Syrian coast, before he attacked the central provinces of the Persian empire. A direct eastward march from the lower part of Palestine across the great Syrian desert was then, as now, utterly impracticable. Marching eastward from Syria, Alexander would, on crossing the Euphrates, arrive at the vast Mesopotamian plains. The wealthy capitals of the empire, Babylon, Susa, and Persepolis, would then lie to his south; and if he marched down through Mesopotamia to attack them, Darius might reasonably hope to follow the Macedonians with his immense force of cavalry, and, without even risking a pitched battle, to harass and finally overwhelm them. We may remember that three centuries afterwards a Roman army under Crassus was thus actually destroyed by the oriental archers and horsemen in these very plains; and that the ancestors of the Parthians who thus vanquished the Roman legions, served by thousands under King Darius. If, on the contrary, Alexander should defer his march against Babylon, and first seek an encounter with the Persian army, the country on each side of the Tigris in this latitude was highly advantageous for such an army as Darius commanded; and he had close in his rear the mountainous districts of northern Media, where he himself had in early life been satrap, where he had acquired reputation as a soldier and a general, and where he justly expected to find loyalty to his person, and a safe refuge in case of defeat.
His great antagonist came on across the Euphrates against him, at the head of an army which Arrian, copying from the journals of Macedonian officers, states to have consisted of forty thousand foot, and seven thousand horse. In studying the campaigns of Alexander, we possess the peculiar advantage of deriving our information from two of Alexander’s generals of division, who bore an important part in all his enterprises. In fact, in reading Arrian, we read General Aristobulus and General Ptolemy on the campaigns of the Macedonians; and it is like reading General Jomini or General Foy on the campaigns of the French.
The estimate which we find in Arrian of the strength of Alexander’s army, seems reasonable when we take into account both the losses which he had sustained, and the reinforcements which he had received since he left Europe. Indeed, to Englishmen, who know with what mere handfuls of men their own generals have, at Plassy, at Assaye, at Meeanee, and other Indian battles, routed large hosts of Asiatics, the disparity of numbers that we read of in the victories won by the Macedonians over the Persians presents nothing incredible. The army which Alexander now led, was wholly composed of veteran troops in the highest possible state of equipment and discipline, enthusiastically devoted to their leader, and full of confidence in his military genius and his victorious destiny.
The celebrated Macedonian phalanx formed the main strength of his infantry. His men were veterans; and he could obtain from them an accuracy of movement and steadiness of evolution, such as probably the recruits of his father would only have floundered in attempting, and such as certainly were impracticable in the phalanx when handled by his successors: especially as under them it ceased to be a standing force, and became only a militia. The main strength of his cavalry consisted in two chosen corps of cuirassiers, one Macedonian, and one Thessalian, each of which was about fifteen hundred strong. They were provided with long lances and heavy swords, and horse as well as man was fully equipped with defensive armour. Other regiments of regular cavalry were less heavily armed, and there were several bodies of light horsemen, whom Alexander’s conquests in Egypt and Syria had enabled him to mount superbly.
The Persian king availed himself to the utmost of every advantage in his power. He caused a large space of ground to be carefully levelled for the operation of his scythe-armed chariots; and he deposited his military stores in the strong town of Arbela, about twenty miles in his rear. The rhetoricians of after ages have loved to describe Darius Codomannus as a second Xerxes in ostentation and imbecility; but a fair examination of his generalship in this his last campaign, shows that he was worthy of bearing the same name as his great predecessor, the royal son of Hystaspes.
On learning that Darius was with a large army on the left of the Tigris, Alexander hurried forward and crossed that river without opposition. He was at first unable to procure any certain intelligence of the precise position of the enemy, and after giving his army a short interval of rest, he marched for four days down the left bank of the river. A moralist may pause upon the fact, that Alexander must in this march have passed within a few miles of the remains of Nineveh, the great city of the primeval conquerors of the human race. Neither the Macedonian king nor any of his followers knew what those vast mounds had once been. They had already become nameless masses of grass-grown ruins; and it is only within the last century that the intellectual energy of Layard has rescued Nineveh from its long centuries of oblivion.
On the fourth day of Alexander’s southward march, his advanced guard reported that a body of the enemy’s cavalry was in sight. He instantly formed his army in order for battle, and directing them to advance steadily, he rode forward at the head of some squadrons of cavalry, and charged the Persian horse whom he found before him. This was a mere reconnoitring party, and they broke and fled immediately; but the Macedonians made some prisoners, and from them Alexander found that Darius was posted only a few miles off, and learned the strength of the army that he had with him. On receiving this news, Alexander halted, and gave his men repose for four days, so that they should go into action fresh and vigorous. He also fortified his camp, and deposited in it all his military stores, and all his sick and disabled soldiers; intending to advance upon the enemy with the serviceable part of his army perfectly unencumbered. After this halt, he moved forward, while it was yet dark, with the intention of reaching the enemy, and attacking them at break of day. About halfway between the camps there were some undulations of the ground, which concealed the two armies from each other’s view. But, on Alexander arriving at their summit, he saw by the early light the Persian host arrayed before him; and he probably also observed traces of some engineering operation having been carried on along part of the ground in front of them. Not knowing that these marks had been caused by the Persians having levelled the ground for the free use of their war-chariots, Alexander suspected that hidden pitfalls had been prepared with a view of disordering the approach of his cavalry. He summoned a council of war forthwith. Some of the officers were for attacking instantly at all hazards, but the more prudent opinion of Parmenion prevailed, and it was determined not to advance farther till the battle-ground had been carefully surveyed.
Greek Soldier, Time of Alexander the Great