347. The brigade does not engage in prescribed drills. It engages in route marches and battle or other tactical exercises. These are conducted pursuant to commands or orders formulated to suit the conditions of the proposed movement or exercise, and, in general, in accordance with the principles applicable to the regiment.

348. A brigade of about 4,000 rifles, as part of a general battle line, would be deployed on a front of not more than 1,200 yards in attack or 1,600 yards in defense.

When acting alone the distance between extreme flanks in an enveloping attack should not exceed 2,000 yards at the time the attacking infantry opens fire.

When acting alone, the front in defense should not exceed 1,600 yards.

These limits apply to the original deployment of the brigade for combat and presuppose an enemy of equal or nearly equal training and morale. The limits necessitated by the subsequent progress of the combat can not be foreseen.

349. Units larger than the brigade are generally composed of all arms. Combined tactics are considered in the Field Service Regulations.