38. The consul, thinking that the king was still in the neighbourhood of Thyatira, came down by continued marches on the fifth day into the Hyrcanian plains. Then when he heard that the other had departed, he followed his track, and pitched his camp on the hither side of the Phrygian river, at the distance of four miles from the enemy. Here, a body of about one thousand horse, (the greatest part of whom were Gallogræcians, the rest Dahans, and archers on horseback, of other nations intermixed,) passing the river with great tumult, made an attack on the advanced Roman guards. First of all they threw into confusion those unprepared; then, when the contest continued longer, and the number of the Romans increased, as succours were easily sent from the neighbouring camp, the king’s troops, becoming weary and unable to withstand superior numbers, endeavoured to retreat; but, before they could reach the river, very many were killed on the bank, by the enemy pressing on their rear. For two days after there was quiet, neither party passing the river. On the third, the Romans passed it with their whole force, and encamped at the distance of about two miles and a half from the enemy. While they were employed in measuring and fortifying the camp, a body of the king’s troops, consisting of three thousand chosen horse and foot, approached with great rapidity and violence. The party on guard, though much inferior in number, (being only two thousand,) without calling off any of the soldiers from the fortifying of the camp, sustained the combat with equal success at first, and, in the progress of the contest, repulsed the enemy, killing a hundred, and taking about the same number. During the four ensuing days, both armies stood in order of battle, before their respective camps. On the fifth, the Romans advanced into the middle of the plain, but Antiochus did not stir; so that his rear was not so far as a thousand feet from his rampart.