(b) Movements in Skirmish Line.
Fire action requires steady breathing, and, on this account, all movements to the position at which the fire fight is to be taken up, should be made, as long as possible, in a free swinging stride. A careful observation of alignment or of intervals cannot be insisted upon. Cover found within the allotted front should be utilized by ploying, but this must neither interfere with the harmonious advance of the entire force nor cause a loss of the march direction. Considerations of cover for individual men should not interfere with the spontaneous progress of the movement. Orderly movements in long skirmish lines are best made by designating a certain element as the base, whose leader is far in advance of it; all neighboring leaders maintain their intervals from, and endeavor to remain approximately on line with him. This has the advantage of relieving the commander of the whole line from looking after these details and leaves him free to concentrate all his attention on the enemy. Minor changes of the march direction are executed by inclining to the right or left or by designating a new objective. More extended movements by the flank, within range of hostile fire, are possible only under cover. Changes of direction are executed like a gradual front into line, in which a temporary echeloning of the elements, or one which can be adjusted by degrees, is unavoidable. (Par. 185 German I. D. R.).
In the absence of cover, an advance in quick time will be possible only at long ranges unless the hostile fire can be kept down by fire from enfilading or commanding positions. Skirmish lines advancing without fire support over ground devoid of cover, begin to suffer appreciable losses at 1000 m. The more effective the hostile fire, the more pressing the necessity of diminishing, as far as this is possible, the periods of time during which the skirmishers present their whole
