Appian of Alexandria Civil Wars 2.11.79

[79] When Pompey learned this he ordered his infantry not to advance farther, not to break the line of formation, and not to hurl the javelin, but to bring their spears to a rest and ward off the onset of the enemy. Some persons praise this order of Pompey as the best in a case where one is attacked in flank, but Caesar criticises it in his letters. ¹ He says that the blows are delivered with more force, and that the spirits of the men are raised, by running, while those who stand still lose courage by reason of their immobility and become excellent targets for those charging against them. So, he says, it proved in this case, for the tenth legion, with Caesar himself, surrounded Pompey’s left wing, now deprived of cavalry, and assailed it with javelins in flank, where it stood immovable; until, finally, the assailants threw it into disorder, routed it, and this was the beginning of the victory. In the rest of the field killing and wounding of all kinds were going on, but no cry came from the scene of carnage, no lamentation from the wounded or the dying, only sighs and groans from those who were falling honorably in their tracks. The allies, who were looking at the battle as at a game, were astonished at the discipline of the combatants. So dumfounded were they that they did not dare attack Caesar’s tents, although they were guarded only by a few old men. Nor did they accomplish anything else, but stood in a kind of stupor.