"This description is not less exact than beautiful. It is manifest, then, that five several spears, differing each from the other in the length of two cubits, are extended before every man in the foremost rank. And when it is considered likewise, that the phalanx is formed by sixteen in depth, it will be easy to conceive, what must be the weight and violence of the entire body, and how great the force of its attack. In the ranks, indeed, that are behind the fifth, the spears cannot reach so far as to be employed against the enemy. In these ranks, therefore, the soldiers, instead of extending their spears forwards, rest them upon the shoulders of the men that are before them, with their points slanting upwards; and in this manner they form a kind of rampart which covers their heads, and secures them against those darts which may be carried in their flight beyond the first ranks, and fall upon those that are behind. But when the whole body advances to charge the enemy, even the hindmost ranks are of no small use and moment. For as they press continually upon those that are before them, they add by their weight alone great force to the attack, and deprive also the foremost ranks of the power of drawing themselves backwards or retreating. Such, then, is the disposition of the phalanx, with regard both to the whole and the several parts. Let us now consider the arms, and the order of battle, of the Romans; that we may see by the comparison in what respects they are different from those of the Macedonians. "To each of the Roman soldiers, as he stands in arms, is allotted the same space likewise of three feet. But as every soldier in the time of action is constantly in motion, being forced to shift his shield continually, that he may cover any part of his body against which a stroke is aimed, and so vary the position of his sword, so as either to push, or to make a falling stroke, there must also be a distance of three feet, the least that can be allowed for performing these motions with advantage, between each soldier and the man that stands next to him, both upon his side and behind him. In charging, therefore, against the phalanx, every single Roman, as he has two Macedonians opposite to him, has also ten spears, which he is forced to encounter. But it is not possible for a single man to cut down these spears with his sword, before they can take their effect, against him. Nor is it easy on the other hand to force his way through them. For the men that are behind add no weight to the pressure, nor any strength to the swords of those that are in the foremost rank. It will be easy, therefore, to conceive, that, while the phalanx retains its own proper position and strength, no troops, as I before observed, can ever support the attack of it in front." Polybius, Book xvii. Ex. iii. in Hampden's translation, 1773.]