It was customary among good troops to have a clash, but not the blind and headlong onset of the mass; the preoccupation [23] of the rank was very great, as the behavior of Caesar's troops at Pharsalus shows in their slow march, timed by the flutes of Lacedaemonian battalions. At the moment of getting close to the enemy, the dash slackened of its own accord, because the men of the first rank, of necessity and instinctively, assured themselves of the position of their supports, their neighbors in the same line, their comrades in the second, and collected themselves together in order to be more the masters of their movements to strike and parry. There was a contact of man with man; each took the adversary in front of him and attacked him, because by penetrating into the ranks before having struck him down, he risked being wounded in the side by losing his flank supports. Each one then hit his man with his shield, expecting to make him lose his equilibrium, and at the instant he tried to recover himself landed the blow. The men in the second line, back of the intervals necessary for fencing in the first, were ready to protect their sides against any one that advanced between them and were prepared to relieve tired warriors. It was the same in the third line, and so on. Every one being supported on either side, the first encounter was rarely decisive, and the fencing, the real combat at close quarters, began. If men of the first line were wounded quickly, if the other ranks were not in a hurry to relieve or replace them, or if there was hesitation, defeat followed. This happened to the Romans in their first encounters with the Gauls. The Gaul, with his shield, parried the first thrust, brought his big iron sword swooping down with fury upon the top of the Roman shield, split it and went after the man. The Romans, already hesitating before the moral impulse of the Gauls, their ferocious yells, their nudeness, an indication of a contempt for wounds, fell then in a greater number than their adversaries and demoralization followed. Soon they accustomed themselves to this valorous but not tenacious spirit of their enemies, and when they had protected the top of their shields with an iron band, they no longer fell, and the roles were changed. The Gauls, in fact, were unable either to hold their ground against the better arms and the thrusts of the Romans, or against their individual superior tenacity, increased nearly tenfold by the possible relay of eight ranks of the maniple. The maniples were self-renewing. Whereas with the Gauls the duration of the combat was limited to the strength of a single man, on account of the difficulties of close or tumultuous ranks, and the impossibility of replacing losses when they were fighting at close quarters.