The advance guard must be promptly informed of the intentions of the commander (_i.e._, whether he intends to attack, to concentrate for attack farther to the rear, or to let the enemy attack[338]) and of the location of the prospective artillery position. The attack order should be withheld until the combat of the advance guard has sufficiently cleared the situation, but a development of the force should be ordered at once. [338] Par. 350 German I. D. R. The advanced detachments should endeavor to gain a start in deployment over the enemy and cover the advancing artillery in front and flank, by quickly deploying strong firing lines and pushing machine guns to the front. After they have done this, they should promptly advance to the attack. Through this, our firing line, while in the act of deploying, runs the serious risk of suddenly encountering, at short range, the fire of superior hostile troops, at a time when all the troops approaching the field are still too far distant to increase its fire power.[339] Whether the quickly formed firing lines should at once move forward to the attack in a rencontre, depends upon the impressions received by the commander. His dispositions should be such as to compel the enemy to disclose his available forces at an early moment. Every fighting line is so sensitive to fire simultaneously delivered against its front and flank, that an attempt to turn the hostile position will instantly force the enemy to take counter-measures. If the enemy is unable to keep pace with us in deploying a firing line, if he is unable to deploy skirmish lines as dense as ours, this state of affairs should induce our commander to proceed to the attack; if the reverse state of affairs exists, he should await the arrival of reinforcements. But in order to obtain this insight into the existing situation the troops must get close to the enemy. Such an insight into the hostile dispositions cannot be gained at long range. The extent of a hostile position may perhaps be determined at long range with the best field glasses, but the strength and power of resistance of the enemy can never be gauged in this manner. If one threatens to push an attack home, however, the enemy will be compelled to show his hand. When opposed by an enemy whose strength is unknown, it will unquestionably be necessary to approach to the extreme limit of short ranges. From here the dispositions of the enemy may be clearly recognized, and, in addition, at 600-800 m., a firing line that has made a lodgment in some feature of the terrain will not as yet be exposed to annihilating losses. Misconceptions are scarcely to be avoided in such a situation. One must trust to luck and take some risks. On the other hand, the training of the infantry should afford the assurance that it will not give up the position it has once reached; it should firmly hold the ground gained, and persevere.[340]