THE WATCH FROM THE TRENCHES.
12.—Trench Warfare an outpost duty.
Trench warfare, the inevitable form of modern warfare, is a continuous series of outpost duty. Hence it is based wholly on eternal vigilance. The patrols correspond to the scouts; the listening posts to the sentinels; the firing trench to the outguards; the cover trench to the supports. The safety of the sector depends entirely on the vigilance of the advanced elements and the rapidity with which supports and the reserves can be summoned.
Watching is thus the fundamental duty in trench warfare.
The following points should be kept in mind: