Our fire control and direction needs more explanation. A method must be had which will work on the battlefield. No one who has seen a modern battle will think for a moment that it is practicable to control and direct a firing line by verbal orders. A battalion commander must be far enough to the rear to observe his entire line. In the noise of a real battle his voice could not be heard ten yards by men on the firing line. The same is equally true of company and platoon commanders. These officers cannot be running up and down the line giving instructions; if they tried it they would not last long. [Sidenote: Use of signals] Our method must therefore be one that can be executed independently of the voice and with as little exposure of the officers as practicable. The method by signals given in our I. D. R. answers the requirements. The text of it can be learned in a few minutes, but to train a battalion so that it will fully respond under danger requires hours of practice: it is one thing that must become a habit. After the mechanism of the drill is learned officers should conduct their line as in battle by signals only. Do not teach men to expect you to be running up and down the line personally correcting errors and giving directions, leading them to expect this to be done in battle. The effect of a decided change in conduct when danger is present is apt not to be good. Moreover, the command will not respond to signals alone on the battlefield if, in instruction work, they have never been taught to depend on them exclusively. We should do everything at battle exercises just as nearly as possible as it will be done in battle. [Sidenote: Use of signals] I have seen at battle exercises men stand up in the open and wave their flags to give the signals. This is absurd. In battle it would be needlessly dangerous, would give the enemy too much information, and it is unnecessary. The necessary signals in the battalion can be given by a man lying on the ground with a handkerchief, or flag without the staff, and be seen for the short distances separating the major from his captains or the captain from his platoon commanders. Practice alone is required to enable this to be done efficiently. It must be so done in battle and must therefore be drilled that way. It should be remembered that the new semaphore code recently adopted does not apply to these signals. The new code requires men to stand; the old must be used for these battle signals. [Sidenote: Additional signals] Additional signals to those given in the I. D. R. may be taught and used in companies. It is doubtful if they are necessary and if not necessary they are wrong. The more signals you have, the more chance of mistakes. Signals for forming squad or platoon columns are unnecessary. These movements are not executed close to the enemy nor when your line is firing, hence verbal commands are practicable and when practicable are desirable, are surer and easier.