Originally Posted by Polybius
The Military Institutions of the Romans: As soon as the consuls are declared, the military tribunes are next appointed. Of these, fourteen are taken from the citizens who have carried arms in five campaigns; and ten more from those who completed ten. For every citizen, before he arrives at the age of forty-six, is obliged to serve either ten years in the cavalry, or sixteen in the infantry: those alone excepted who are placed by the censors below the rate of four hundred drachmae; and who are all reserved for the service of the sea. In the case of any pressing danger the time of continuing in the infantry is extended to twenty years. No citizen is permitted by the laws to sue for any magistracy before he has completed the serving of ten campaigns.
When the enrollments are to be made the consuls give notice before to the people of a certain day, upon which all the Romans that are of sufficient age are required to attend. This is done every year. And when the day arrives, and the men all appear at Rome, and are assembled afterwards in the Capitol, the tribunes of the youngest order divide themselves, as they are appointed either by the consuls or the people, into four separate bodies. For this division corresponds with the first and general distribution of all the forces into four separate legions. Of these tribunes, therefore, the four first named are assigned to the first legion; the three next to the second; the following four to the third; and the last three appointed to the fourth. Of the tribunes of the oldest order the two that are first named are placed in the first legion; the three second in the second; the two that follow in the third; and the remaining three in the fourth. By this distribution and division an equal number of commanders is allotted to each legion.
When this is done, the tribunes of each legion, having taken their seats apart, draw out the tribes one by one by lot; and calling to them that upon which the lot first falls, they select from it four young men, as nearly equal as is possible in age and stature. And when these are brought forward from the rest, the tribunes of the first legion first choose one; then those of the second a second; those of the third take the third; and those of the fourth the last. After these four more are made to approach. And now the tribunes of the second legion first make their choice; then those of the rest in order; and last of all the tribunes of the first. In the same manner again, from the next four that follow, the tribunes of the third legion choose the first; and those of the second the last. And thus, by observing the same method of rotation to the end, it happens that the legions, with respect to the men of which they are composed are all alike and equal. The number allotted to each legion is four thousand and two hundred; and sometimes five thousand, when any great and unusual danger is foreseen. After these had been thus selected it was anciently the custom to choose the cavalry; and to add two hundred horsemen to each four thousand of the infantry But in the present times, the citizens, of whom the cavalry is composed, are first enrolled; having been before appointed by the censors, according to the rate of their revenue; and three hundred are assigned to every legion.
When the enrollments are in this manner finished, the tribunes having assembled together in separate bodies the soldiers of their respective legions, choose out a man that seems most proper for the purpose, and make him swear in the following words: "that he will be obedient to his commanders, and execute all the orders that he shall receive from them to the utmost of his power." The rest of the soldiers of the legion, advancing one by one, swear also that they will perform what the first has sworn. About the same time, likewise, the consuls send notice to the magistrates of the allied cities of Italy, from which they design to draw any forces, what number of troops are wanted, and at what time and place they are required to join the Roman army. The cities, having raised their levies in the same manner that has now been mentioned, and administered to them the same oath, send them away attended by a paymaster and a general.
At Rome the tribunes, after the ceremony of the oath is finished, command all the legions to return without arms upon a certain day, and then dismiss them. And when they are met together again at the appointed time, those that are youngest, and of the lowest condition, are set apart for the light-armed troops. From the next above these in age are selected the hastati; from those that are in full strength and vigor, the principes; and the oldest of all that are enrolled are the triarii. For every legion is composed of all these different bodies; different in name, in age, and in the manner in which they are armed. This division is so adjusted that the triarii amount to six hundred men; the principes are twelve hundred; the hastati an equal number; and all the rest light-armed. If a legion consist of more than four thousand men, the several bodies are increased in due proportion; except only that the number of the triarii always remains the same.
The youngest of these troops are armed with a sword, light javelins, and a buckler. The buckler is both strongly made, and of a size sufficient for security. For it is of a circular form, and has three feet in the diameter. They wear likewise upon their heads some simple sort of covering; such as the skin of a wolf, or something of a similar kind; which serves both for their defense, and to point out also to the commanders those particular soldiers that are distinguished either by their bravery or want of courage in the time of action. The wood of the javelins is of the length of two cubits, and of the thickness of a finger. The iron part is a span in length, and is drawn out to such a slender fineness towards the point, that it never fails to be bent in the very first discharge, so that the enemy cannot throw it back again. Otherwise it would be a common javelin.
The next in age, who are called the hastati, are ordered to furnish themselves with a complete suit of armor. This among the Romans consists in the first place of a shield of a convex surface; the breadth of which is two feet and a half; and the length four feet, or four feet and a palm of those of the largest size. It is composed of two planks, glued together, and covered first with linen, and afterwards with calves' skin. The extreme edges of it, both above and below, are guarded with plates of iron; as well to secure it against the strokes of swords, as that it may be rested also upon the ground without receiving any injury. To the surface is fitted likewise a shell of iron; which serves to turn aside the more violent strokes of stones, or spears, or any other ponderous weapon. After the shield comes the sword, which is carried upon the right thigh, and is called the Spanish sword. It is formed not only to push with at the point; but to make a falling stroke with either edge, and with singular effect; for the blade is remarkably strong and firm. To these arms are added two piles or javelins; a helmet made of brass; and boots for the legs. The piles are of two sorts; the one large, the other slender.
Of the former those that are round have the breadth of a palm in their diameter; and those that are square the breadth of a palm likewise is a side. The more slender, which are carried with the other, resemble a common javelin of a moderate size. In both sorts, the wooden part is of the same length likewise, and turned outwards at the point, in the form of a double hook, is fastened to the wood with so great care and foresight, being carried upwards to the very middle of it, and transfixed with many close-set rivets, that it is sooner broken in use than loosened; though in the part in which it is joined to the wood, it is not less than a finger and a half in thickness. Upon the helmet is worn an ornament of three upright feathers, either red or black, of about a cubit in height; which being fixed upon the very top of the head, and added to their other arms, make the troops seem to be of double size, and gives them an appearance which is both beautiful and terrible. Beside these arms, the soldiers in general place also upon their breasts a square plate of brass, of the measure of a span on either side, which is called the guard of the heart. But all those who are rated at more than ten thousand drachmae cover their breasts with a coat of mail. The principes and the triarii are armed in the same manner likewise as the hastati; except only that the triarii carry pikes instead of javelins.
From each of these several sorts of soldiers, the youngest alone excepted, ten men of distinguished merit are first selected; and after these, ten more. These are all called commanders of companies; and he that is first chosen has a seat in the military council. After these, twenty more are appointed to conduct the rear; and are chosen by the former twenty. The soldiers of each different order, the light troops excepted, are then divided into ten separate parts; to each of which are assigned four officers, of those who have been thus selected: two to lead the van, and two to take the care of the rear. The light-armed troops are distributed in just proportion among them all. Each separate part is called a company, a band, or an ensign; and the leaders, captains of companies or centurions. Last of all, two of the bravest and most vigorous among the soldiers are appointed by the captains to carry the standards of the company.
It is not without good reason that two captains are assigned to every company. For as it always is uncertain, what will be the conduct of an officer, or to what accidents he may be exposed; and, as in the affairs of war, there is no room for pretext or excuse; this method is contrived, that the company may not upon any occasion be destitute of a leader. When the captains therefore both are present, he that was first chosen leads the right, and the other the left of the company. And when either of them is absent, he that remains takes the conduct of the whole. In the choice of these captains not those that are the boldest and most enterprising are esteemed the best; but those rather, who are steady and sedate; prudent in conduct, and skillful in command. Nor is it so much required, that they should be at all times eager to begin the combat, and throw themselves precipitately into action; as that, when they are pressed, or even conquered by a superior force, they should still maintain their ground, and rather die than desert their station.
The cavalry is divided also into ten parts or troops. In each of these, three captains first are chosen; who afterwards appoint three other officers to conduct the rear. The first of the captains commands the whole troop. The other two hold the rank and office of decurions; and all of them are called by that name. In the absence of the first captain, the next in order takes the entire command. The manner in which these troops are armed is at this time the same as that of the Greeks. But anciently it was very different. For, first, they wore no armor upon their bodies; but were covered, in the time of action, with only an undergarment. In this method, they were able indeed to descend from their horses, or leap up again upon them, with greater quickness and facility; but, as they were almost naked, they were too much exposed to danger in all those engagements. The spears also that were in use among them in former times were, in a double respect, very unfit for service. First, as they were of a slender make, and always trembled in the hand, it not only was extremely difficult to direct them with exactness towards the destined mark; but very frequently, even before their points had reached the enemy, the greatest part of them were shaken into pieces by the bare motion of the horses. Add to this, that these spears, not being armed with iron at the lowest end, were formed to strike only with the point, and, when they were broken by this stroke, were afterwards incapable of any farther use.
Their buckler was made of the hide of an ox, and in form was not unlike to those globular dishes which are used in sacrifices. But this was also of too infirm a texture for defense; and, as it was at first not very capable of service, it afterwards became wholly useless, when the substance of it had been softened and relaxed by rain. The Romans, therefore, having observed these defects, soon changed their weapons for the armor of the Greeks. For the Grecian spear, which is firm and stable, not only serves to make the first stroke with the point in just direction and with sure effect; but, with the help of the iron at the opposite end, may, when turned, be employed against the enemy with equal steadiness and force. In the same manner also the Grecian shields, being strong in texture, and capable of being held in a fixed position, are alike serviceable both for attack and for defense. These advantages were soon perceived, and the arms adopted by the cavalry. For the Romans, above all other people, are excellent in admitting foreign customs that are preferable to their own. (and it goes on and on...)
