At this juncture, Mardonius made trial of the Grecian courage, by sending his whole number of horse, in which he thought himself much the stronger, against them, while they were all, except the Megarians, encamped at the foot of Mount Cithaeron, in strong and rocky places. They being three thousand in number, had pitched their tents on the plain, where the cavalry charged and made inroads upon them from all sides. They sent, therefore, in haste to Pausanias, demanding relief, not being able alone to sustain the great numbers of the barbarians. Pausanias, hearing this, and perceiving the tents of the Megarians almost hidden by the multitude of darts and arrows, and themselves driven together into a narrow space, was at a loss how to aid them with his battalions of heavy-armed Lacedaemonians. He asked, therefore, as a test of emulation and love of distinction, to the commanders and captains who were around him, if any would voluntarily take upon the defense and succor of the Megarians. The rest being backward, Aristides undertook the enterprise for the Athenians, and sent Olympiodorus, the most valiant of his inferior officers, with three hundred chosen men and some archers under his command. These were soon in readiness, and running upon the enemy, as soon as it was perceived by Masistius, who commanded the cavalry of the barbarians, a man of wonderful courage and of extraordinary bulk and comeliness of person, he turned his steed and made towards them. They sustained the shock and joined battle with him, as though by this encounter they were to try the success of the whole war. But after Masistius's horse received a wound, and flung him, and he falling, could hardly raise himself through the weight of his armor, the Athenians pressed upon him with blows, but could not easily get at his person, armed as he was, breast, head, and limbs all over, with gold and brass and iron; but one of them at last, running a javelin under the visor of his helmet, slew him; and the rest of the Persians, leaving the body, fled. The greatness of the Greek success was known, not by the multitude of the slain, (for an inconsiderable number were killed), but by the sorrow the barbarians expressed. For they shaved themselves, their horses, and mules for the death of Masistius, and filled the plain with howling and lamentation; having lost a person, who, next to Mardonius himself, was by far the chief among them, both for valor and authority.