The position of the Senatorial army was well taken. Its right wing rested on the Enipeus, its left was spread out on the plain. Pompey himself commanded the left with the two legions the Senate had taken from Caesar. Outside him on the plain were his allies covered by the cavalry. Opposite Pompey was Caesar, with the famous Tenth Legion. His left and centre were led by his faithful Tribunes, Mark Antony and Cassius Longínus.
At the given signal Caesar's front ranks advanced on a run, threw their darts, drew their swords, and closed in. At once Pompey's cavalry charged, outflanking the enemy's right wing, and driving back the opposing cavalry, who were inferior in numbers. But as they advanced flushed with victory, Caesar's fourth line, which he had held in reserve, and which was made up of the flower of his legions, appeared in their way. So fierce was their attack that the Pompeians wavered, turned, and fled. They never rallied. The fourth line threw themselves upon Pompey's left wing, which was now unprotected. This wing, composed of Caesar's old veterans, was probably in no mood to fight its former comrades in arms. At any rate, it turned and fled. Pompey himself mounted his horse and rode off in despair. Thus the battle ended in a rout. But two hundred of Caesar's men fell, while fifteen thousand of the enemy lay dead on the field.
The abandoned camp was a remarkable sight. The luxurious patricians had built houses of turf with ivy trained over the entrances to protect their delicate skins from the sun's rays; couches were stretched out ready for them to take repose after their expected victory, and tables were spread with dainty food and wines on which to feast. As he saw these preparations Caesar exclaimed, "These are the men who accused my suffering, patient army, which needed the common necessaries of life, of dissoluteness and profligacy." But Caesar could not delay. Leaving a portion of his forces in camp, by rapid marching he cut off the retreat of the enemy. Twenty-four thousand surrendered, all of whom were pardoned. Domitius, whom we saw at Corfinium and Massilia, was killed trying to escape. Labiénus, Afranius, and Petreius managed to steal away by night. Thus ended the battle of Pharsalia.