The spears were so long that when the men stood in close order, the rear ranks being brought up near to those before them, the points of the spears of eight or ten of the ranks projected in front, forming a bristling wall of points of steel, each one of which was held in its place by the strong arms of an athletic and well-trained soldier. This wall no force which could in those days be brought against it could penetrate. Men, horses, elephants, every thing that attempted to rush upon it, rushed only to their own destruction. Every spear, feeling the impulse of the vigorous arms which held it, seemed to be alive, and darted into its enemy, when an enemy was at hand, as if it felt itself the fierce hostility which directed it. If the enemy remained at a distance, and threw javelins or darts at the phalanx, they fell harmless, stopped by the shields which the soldiers wore upon the left arm, and which were held in such a manner as to form a system of scales, which covered and protected the whole mass, and made the men almost invulnerable. The phalanx was thus, when only defending itself and in a state of rest, an army and a fortification all in one, and it was almost impregnable. But when it took an aggressive form, put itself in motion, and advanced to an attack, it was infinitely more formidable. It became then a terrible monster, covered with scales of brass, from beneath which there projected forward ten thousand living, darting points of iron. It advanced deliberately and calmly, but with a prodigious momentum and force. There was nothing human in its appearance at all. It was a huge animal, ferocious, dogged, stubborn, insensible to pain, knowing no fear, and bearing down with resistless and merciless destruction upon every thing that came in its way. The phalanx was the center and soul of Alexander's army. Powerful and impregnable as it was, however, in ancient days, it would be helpless and defenseless on a modern battle-field. Solid balls of iron, flying through the air with a velocity which makes them invisible, would tear their way through the pikes and the shields, and the bodies of the men who bore them, without even feeling the obstruction.