Alexander

But when they saw Alexander close at hand and terrible, and driving those who fled before him upon those who held their ground, they were smitten with fear and scattered, for the most part. The bravest and noblest of them, however, slain in front of their king and falling in heaps upon one another, obstructed the Macedonians in their pursuit, weaving and twining themselves in their last agonies about riders and horses.

But Dareius, now that all the terrors of the struggle were before his eyes, and now that the forces drawn up to protect him were crowded back upon him, since it was not an easy matter to turn his chariot about and drive it away, seeing that the wheels were obstructed and entangled in the great numbers of the fallen, while the horses, surrounded and hidden away by the multitude of dead bodies, were rearing up and frightening the charioteer, forsook his chariot and his armour, mounted a mare which, as they say, had newly foaled, and took to flight.