39.3
After advancing a single day’s march, he saw that the Parthians were enveloping him and seeking to attack him on the march. He therefore displayed the signal for battle in his camp, and after taking down his tents, as though his purpose was not to fight but to withdraw, he marched along past the line of the Barbarians, which was crescent-shaped. But he had given orders that when the first ranks of the enemy should appear to be within reach of his legionaries, the cavalry should charge upon them.
39.4
To the Parthians in their parallel array, the discipline of the Romans seemed to beggar description, and they watched them marching past at equal distances from one another, without confusion, and in silence, brandishing their javelins. But when the signal was given, and the Roman horsemen wheeled about and rode down upon them with loud shouts, they did indeed receive their onset and repel them, although their foes were at once too close for them to use their arrows; when, however, the legionaries joined in the charge, with shouts and clashing of weapons, the horses of the Parthians took fright and gave way, and the Parthians fled without coming to close quarters.
