The number of patrols sent out will, of course, depend on the importance of the task. If the strength of a squadron is insufficient to provide them, it must be supplemented by patrols detailed from other squadrons. The relief of such patrols, also, may have to be carried out by the same means. Cutting down the number of distant patrols is to be avoided as far as possible. Economy of force can be better obtained by careful husbanding of strength in the close reconnaissance and service of security.
The strength of distant patrols should never be arbitrarily laid down, as in this respect also the circumstances must be taken into account. Patrols which are far distant from the road upon which the squadron is advancing, and which can only be reached with difficulty, require a greater degree of independence than those in the immediate neighbourhood, which can be rapidly supported or strengthened. The probability, also, of meeting with superior hostile force demands a greater proportion of strength. Under certain circumstances a whole troop may be used as an independent patrol. At the same time a wise economy of force must be practised so that the fighting and marching efficiency of the squadron does not suffer too much. To this end, quite weak patrols must be made to suffice in directions of secondary importance. A second in command must be detailed to every patrol. There should also be a supply of trained lance-corporals ready to lead such patrols as may be required to carry information to the rear.
The strength of patrols will depend largely on the number of messages that they are expected to send in. As a general rule, in large operations, not more than two messages will be required from each patrol during the day. It is only when the opposing armies approach each other, and the distant patrols gradually become close patrols, that it will be necessary to report frequently on tactical events. The distances, however, will then have so far diminished, that a reinforcement of the patrols from the squadrons would probably be possible if they have become over-weak through transmission duties.
Like the reconnoitring squadrons, the patrols require relief from time to time, as the same patrol leader cannot be expected to remain in continuous touch with the enemy.