It can be obtained in the two following ways:
The execution of an intense fire by the whole line;
The execution of a slow, deadly, and precise fire by the best shots,
well concealed.
The men are under cover, consequently it is possible to avoid the first
plan, which is noisy and not particularly effective but which
circumstances beyond our control sometimes make necessary.
The best shots are designated by the chiefs of section. They construct
masks in front of themselves, behind which they fire obliquely, that is
to say, under excellent conditions of security and calm. They locate an
adversary, keep aiming at him and firing each time that he appears, and
they go successively from right to left. This method is very effective;
the enemy does not dare to fire any more, and it soon seems as if his
trench were empty.
In addition if possible, get a small group to the front or on the flank,
who will protect a forward movement by their fire.