Arbela, the city which has furnished its name to the decisive battle that gave Asia to Alexander, lies more than twenty miles from the actual scene of conflict. The little village then named Gaugamela is close to the spot where the armies met, but has ceded the honour of naming the battle to its more euphonious neighbour. Gaugamela is situate in one of the wide plains that lie between the Tigris and the mountains of Kurdistan. A few undulating hillocks diversify the surface of this sandy track; but the ground is generally level, and admirably qualified for the evolutions of cavalry, and also calculated to give the larger of two armies the full advantage of numerical superiority. The Persian King (who before he came to the throne, had proved his personal valour as a soldier, and his skill as a general) had wisely selected this region for the third and decisive encounter between his forces and the invaders. The previous defeats of his troops, however severe they had been, were not looked on as irreparable, The Granicus had been fought by his generals rashly and without mutual concert. And, though Darius himself had commanded and been beaten at Issus, that defeat might be attributed to the disadvantageous nature of the ground; where, cooped up between the mountains, the river, and the sea, the numbers of the Persians confused and clogged alike the general's skill and the soldiers' prowess, so that their very strength became their weakness. Here, on the broad plains of Kurdistan, there was scope for Asia's largest host to array its lines, to wheel, to skirmish, to condense or expand its squadrons, to manoeuvre, and to charge at will. Should Alexander and his scanty band dare to plunge into that living sea of war, their destruction seemed inevitable. Darius felt, however, the critical nature to himself as well as to his adversary of the coming encounter. He could not hope to retrieve the consequences of a third overthrow. The great cities of Mesopotamia and Upper Asia, the central provinces of the Persian empire, were certain to be at the mercy of the victor. Darius knew also the Asiatic character well enough to be aware how it yields to the prestige of success, and the apparent career of destiny. He felt that the diadem was now either to be firmly replaced on his own brow, or to be irrevocably transferred to the head of his European conqueror. He, therefore, during the long interval left him after the battle of Issus, while Alexander was subjugating Syria and Egypt, assiduously busied himself in selecting the best troops which his vast empire supplied, and in training his varied forces to act together with some uniformity of discipline and system.