For this reason, guerrilla arms ought to be the same as those used by the enemy, except for weapons such as revolvers and shotguns, for which the ammunition can be obtained in the zone itself or in the cities.
The number of men that a guerrilla band of this type should include does not exceed ten to fifteen. In forming a single combat unit it is of great importance always to consider the limitations on numbers: ten, twelve, fifteen men can hide anywhere and at the same time can help each other in putting up a powerful resistance to the enemy. Four or five would perhaps be too small a number, but when the number exceeds ten, the possibility that the enemy will discover them in their camp or on the march is much greater.
Remember that the velocity of the guerrilla band on the march is equal to the velocity of its slowest man. It is more difficult to find uniformity of marching speed with twenty, thirty, or forty men than with ten. And the guerrilla fighter on the plain must be fundamentally a runner. Here the practice of hitting and running acquires its maximum use. The guerrilla bands on the plain suffer the enormous inconvenience of being subject to a rapid encirclement and of not having sure places where they can set up a firm resistance; therefore, they must live in conditions of absolute secrecy for a long time, since it would be dangerous to trust any neighbor whose fidelity is not perfectly established. The reprisals of the enemy are so violent, usually so brutal, inflicted not only on the head of the family but frequently on the women and children as well, that pressure on individuals lacking firmness may result at any moment in their giving way and revealing information as to where the guerrilla band is located and how it is operating. This would immediately produce an encirclement with consequences always disagreeable, although not necessarily fatal. When conditions, the quantity of arms, and the state of insurrection of the people call for an increase in the number of men, the guerrilla band should be divided. If it is necessary, all can rejoin at a given moment to deal a blow, but in such a way that immediately afterwards they can disperse toward separate zones, again divided into small groups of ten, twelve, or fifteen men.
It is entirely feasible to organize whole armies under a single command and to assure respect and obedience to this command without the necessity of being in a single group. Therefore, the election of the guerrilla chiefs and the certainty that they coordinate ideologically and personally with the overall chief of the zone are very important.
The bazooka is a heavy weapon that can be used by the guerrilla band because of its easy portability and operation. Today the rifle- fired anti-tank grenade can replace it.