The signal was given. Caesar's front rank advanced running. Seeing the Pompeians did not move, they halted, recovered breath, then rushed on, flung their darts, and closed sword in hand. At once Pompey's horse bore down, outflanking Caesar's right wing, with the archers behind and between them raining showers of arrows. Caesar's cavalry gave way before the shock, and the outer squadrons came wheeling round to the rear, expecting that there would be no one to encounter them. The fourth line, the pick and flower of the legions, rose suddenly in their way. Surprised and shaken by the fierceness of the attack on them, the Pompeians turned, they broke, they galloped wildly off. The best cavalry in those Roman battles were never a match for infantry when in close formation, and Pompey's brilliant squadrons were carpet-knights from the saloon and the circus. They never rallied, or tried to rally; they made off for the nearest hills. The archers were cut to pieces; and the chosen corps, having finished so easily the service for which they had been told off, threw themselves on the now exposed flank of Pompey's left wing. It was composed, as has been said, of the legions which had once been Caesar's, which had fought under him at the Vingeanne and at Alesia. They ill liked, perhaps, the change of masters, and were in no humor to stand the charge of their old comrades coming on with the familiar rush of victory. Caesar ordered up his third line, which had not yet been engaged; and at once on all sides Pompey's great army gave way, and fled. Pompey himself, the shadow of his old name, long harasssd out of self-respect by his senatorial directors, a commander only in appearance, had left the field in the beginning of the action. He had lost heart on the defeat of the cavalry, and had retired to his tent to wait the issue of the day. The stream of fugitives pouring in told him too surely what the issue had been. He sprang upon his horse and rode off in despair. His legions were rushing back in confusion. Caesar, swift always at the right moment, gave the enemy no leisure to re-form, and fell at once upon the camp. It was noon, and the morning had been sultry; but heat and weariness were forgotten in the enthusiasm of a triumph which all then believed must conclude the war. A few companies of Thracians, who had been left on guard, made a brief resistance, but they were soon borne down. The beaten army, which a few hours before were sharing in imagination the lands and offices of their conquerors, fled out through the opposite gates, throwing away their arms, flinging down their standards, and racing, officers and men, for the rocky hills which at a mile's distance promised them shelter.