Sulla hastened to his aid, and Archelaus, seeing him coming, instantly counter-marched and attacked Sulla's right in his absence, while Taxiles assailed Murena on the left. But Sulla hastened back, too, after leaving Hortensius to support Murena, and, when he appeared, the right wing drove back Archelaus to the Cephissus. Murena was equally triumphant on the left wing, and the barbarians fled pell-mell to the Cephissus, only 10,000 of them reaching Chalcis in Euboea. [Sidenote: Sulla's falsehood about the battle.] Appian says the Romans lost only thirteen men, while Plutarch, on the authority of Sulla's Memoirs, says that they lost four. This is absurd. Sulla seems to have told some startling lies in his Memoirs, perhaps to prove that he had been the favourite of fortune, which was a mania of his. [Sidenote: Dorylaus reinforces Archelaus.] Mithridates, when he heard of the defeat of Archelaus, sent Dorylaus with 8,000 men to Euboea, where he joined the remnant of the army of Archelaus, and crossing to the mainland met Sulla at Orchomenus. Sulla was in Phthiotis, to confront L. Valerius Flaccus who had come to supersede him, but he returned as soon as he heard that Dorylaus had landed. Orchomenus is just north of the Cephissus where it runs into Lake Copais, and a stream called Melas, rising on the east of Orchomenus, joined the Cephissus near its mouth, the neighbouring ground being a marsh. [Sidenote: Battle of Orchomenus. Disposition of Archelaus' army.] Archelaus did not want to fight, but Dorylaus hinted at treachery and had, no doubt, been ordered by Mithridates to avenge Chaeroneia. Near Mount Tilphossium, however, to the south of Lake Copais, he was worsted by Sulla in a skirmish, and thinking better of the advice of Archelaus tried to prolong the war. Archelaus, indeed, seems to have commanded in the battle, for Mithridates was shrewd enough to know when he had a good general. He drew up his army in four lines, the scythed chariots in front, behind them the Macedonian phalanx, then his auxiliaries, including Italian deserters, and, lastly, his light-armed troops. On each flank he posted his cavalry. [Sidenote: Sulla's arrangements.] Sulla, who was weak in cavalry, dug two ditches guarded by forts, one on each flank, so as to keep off the enemy's horse. Then he drew up his infantry in three lines, leaving gaps in them for the light troops and cavalry to come through from the rear when needed. To the second line stakes were given, with orders to plant them so as to form a palisade; and the first line, when the chariots charged, retired behind the palisade, while the light troops advanced through the gaps and hurled missiles at the horses and drivers. The chariots turned and threw the phalanx into confusion, and when Archelaus ordered up his cavalry, Sulla sent round his to take them in the rear. At one time, however, the contest was doubtful, and the Romans wavered, till they were put to shame by their general, who,