It was ever his custom to expose his life freely in battle, and to emulate the personal prowess of his great ancestor, Achilles. Perhaps in the bold enterprise of conquering Persia, it was politic for Alexander to raise his army’s daring to the utmost by the example of his own heroic valour; and, in his subsequent campaigns, the love of the excitement, of “the rapture of the strife,” may have made him, like Murat, continue from choice a custom which he commenced from duty. But he never suffered the ardour of the soldier to make him lose the coolness of the general; and at Arbela, in particular, he showed that he could act up to his favourite Homeric maxim of being
Ἀμφότερον, βασιλεύς τ’ ἀγαθὸς κρατερός τ’ αἰχμητής.[26]
Great reliance had been placed by the Persian king on the effects of the scythe-bearing chariots. It was designed to launch these against the Macedonian phalanx, and to follow them up by a heavy charge of cavalry, which it was hoped would find the ranks of the spearmen disordered by the rush of the chariots, and easily destroy this most formidable part of Alexander’s force. In front, therefore, of the Persian centre, where Darius took his station, and which it was supposed the phalanx would attack, the ground had been carefully levelled and smoothed, so as to allow the chariots to charge over it with their full sweep and speed. As the Macedonian army approached the Persian, Alexander found that the front of his whole line barely equalled the front of the Persian centre, so that he was outflanked on his right by the entire left wing of the enemy, and by their entire right wing on his left. His tactics were to assail some one point of the hostile army, and gain a decisive advantage, while he refused, as far as possible, the encounter along the rest of the line. He therefore inclined his order of march to the right, so as to enable his right wing and centre to come into collision with the enemy on as favourable terms as possible, though the manœuvre might in some respects compromise his left.
The effect of this oblique movement was to bring the phalanx and his own wing nearly beyond the limits of the ground which the Persians had prepared for the operations of the chariots; and Darius, fearing to lose the benefit of this arm against the most important parts of the Macedonian force, ordered the Scythian and Bactrian cavalry, who were drawn up on his extreme left, to charge upon Alexander’s right wing, and check its further lateral progress. Against these assailants Alexander sent from his second line Menidas’ cavalry. As these proved too few to make head against the enemy, he ordered Ariston also from the second line with his light horse, and Cleander with his foot, in support of Menidas. The Bactrians and Scythians now began to give way, but Darius reinforced them by the mass of Bactrian cavalry from his main line, and an obstinate cavalry fight now took place. The Bactrians and Scythians were numerous, and were better armed than the horsemen under Menidas and Ariston; and the loss at first was heaviest on the Macedonian side. But still the European cavalry stood the charge of the Asiatics, and at last, by their superior discipline, and by acting in squadrons that supported each other instead of fighting in a confused mass like the barbarians, the Macedonians broke their adversaries, and drove them off the field.
Scythe-bearing Chariot
(Showing the Attachment of the Scythe to the Axle)
Darius now directed the scythe-armed chariots to be driven against Alexander’s horse-guards and the phalanx; and these formidable vehicles were accordingly sent rattling across the plain, against the Macedonian line. When we remember the alarm which the war-chariots of the Britons created among Cæsar’s legions, we shall not be prone to deride this arm of ancient warfare as always useless. The object of the chariots was to create unsteadiness in the ranks against which they were driven, and squadrons of cavalry followed close upon them, to profit by such disorder. But the Asiatic chariots were rendered ineffective at Arbela by the light-armed troops whom Alexander had specially appointed for the service, and who, wounding the horses and drivers with their missile weapons, and running alongside so as to cut the traces or seize the reins, marred the intended charge; and the few chariots that reached the phalanx passed harmlessly through the intervals which the spearmen opened for them, and were easily captured in the rear.
A mass of the Asiatic cavalry was now, for the second time, collected against Alexander’s extreme right, and moved round it, with the view of gaining the flank of his army. At the critical moment, Aretes, with his horsemen from Alexander’s second line, dashed on the Persian squadrons when their own flanks were exposed by this evolution. While Alexander thus met and baffled all the flanking attacks of the enemy with troops brought up from his second line, he kept his own horse-guards and the rest of the front line of his wing fresh, and ready to take advantage of the first opportunity for striking a decisive blow. This soon came. A large body of horse, who were posted on the Persian left wing nearest to the centre, quitted their station, and rode off to help their comrades in the cavalry fight that still was going on at the extreme right of Alexander’s wing against the detachments from his second line. This made a huge gap in the Persian array, and into this space Alexander instantly dashed with his guard; and then pressing towards his left, he soon began to make havoc in the left flank of the Persian centre. The shield-bearing infantry now charged also among the reeling masses of the Asiatics; and five of the brigades of the phalanx, with the irresistible might of their sarissas, bore down the Greek mercenaries of Darius, and dug their way through the Persian centre. In the early part of the battle, Darius had shown skill and energy; and he now for some time encouraged his men, by voice and example, to keep firm. But the lances of Alexander’s cavalry and the pikes of the phalanx now gleamed nearer and nearer to him. His charioteer was struck down by a javelin at his side; and at last Darius’ nerve failed him; and, descending from his chariot, he mounted on a fleet horse and galloped from the plain, regardless of the state of the battle in other parts of the field, where matters were going on much more favourably for his cause.