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Rh although the manœuvre might in some respect 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 in advance on his extreme left, to charge round upon Alexander's right wing, and check its further lateral progress. Against these assailants Alexander sent from his second line Menidas's 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 Oleander, 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