THE COMPANIES IN SUPPORT.
175.—Position.
They are kept out of range of the enemy's fire upon the firing line but near enough to interfere as soon as called upon.
176.—Liaison with battalion commander.
The captains keep in touch with the battalion commander.
177.—Advance into action.
These companies advance into the fire zone with the necessary precautions, either by fractions or entire, taking advantage of favorable conditions: inefficiency of the enemy's fire, effectiveness of the firing line, etc.