(n) _March Outpost_.--A march outpost is usually an advance guard
halted, with observers in each unit on the alert. A cossack post
might be established on a good near by observation point. The march
outpost is the protection furnished the main body at short halts, or
on making camp before the outpost is established.

(o) _Outpost_.--The outpost may be best illustrated by circles:

Each support is numbered from right to left. Each outguard in each
support is numbered from right to left. Each sentinel post in each
outguard is numbered from right to left. Outguards are divided into
three classes, cossack posts, sentry squads and packets. A cossack
post consists of 4 men, 1 posted in observation near the posts of the
remaining three.

A sentry squad consists of one squad, posts a double sentinel post in
observation near the post of the squad. A picket consists of two or
more squads not exceeding half a company. It furnishes cossack posts,
sentry squads, sentinel posts, and patrols. It is usually placed at
the more important points of the outguard line, as a road fork, etc.
The post furnished by pickets may be as far as 100 yards away. There
should be also a sentinel post near the picket in observation. If the
outguard consists of two or more companies there is a reserve. The
reserve is held at some suitable point, where it can readily support
the line. The reserve maintains connection with the main body and the
support. The support occupies the line to be held. This line should be
entrenched. The support maintains communication with its outguards and
with each support on its flanks. It also sends out the necessary
reconnoitering patrols. The outguards furnish sentinel posts and
maintain communication with them, and with the outguards on each