30. This movement threw the Greek army into disorder, and the three main divisions became separated from one another. Perceiving this the next morning, Mardonius hastened with his Persians toward the higher ground, where the Spartan troops might be seen winding along under the hillside, for from the river-banks he could not catch sight of the Athenians, who were hidden among the low hills which rose from the level plain. 31. The last momentous strife had now begun. It was the custom of the Spartans before beginning a battle to offer sacrifice, and to wait for an omen or sign from heaven on the offering. Even now, when the Persians had advanced to within bow-shot and were pouring flights of arrows upon the Spartans, Pausanias offered sacrifice. But the omens were bad, and forbade any action except in self-defence. The Spartans knelt behind their shields, but the arrows pierced them, and the bravest men died sorrowfully, lamenting not for death, but because they died without striking a blow for Sparta. In his distress Pausanias called upon the goddess Hera, and the omens suddenly became favorable, and the Spartans with their Tegean allies threw themselves upon the enemy. 32. But the disparity of forces rendered the attack desperate. Fifty-three thousand Greeks in all were opposed to the overwhelming numbers of Mardonius. The Athenians were engaged elsewhere and could afford no assistance. The Persians had made a palisade of their wicker shields, behind which they could securely and effectually use their bows and arrows. By the first fierce onset of the Greeks this palisade went down, but the Asiatics, laying aside their bows, fought desperately with javelins and daggers. But they had no metal armor to defend them; and the Spartans, with their lances fixed and their shields touching each other, bore down everything before them. 33. The Persians fought with almost Hellenic heroism. Coming to close quarters, they seized the spears of their enemies and broke off their heads. Rushing forward singly or in small groups, they were borne down in the crush and killed; still they were not dismayed; and the battle raged more fiercely on the spot where Mardonius, on his white horse, fought with the flower of his troops. At length Mardonius was slain, and when his chosen guards had fallen around him, the remainder of the Persians made their way to their fortified camp, and took refuge behind its wooden walls.