n of the rear-guard cavalry following the
support. The support, as in an advance guard, is divided into two parts;
that part nearest the enemy is called the rear party and marches with a
rear point.

DISTANCES

The distance of the rear guard from the main body and between the
fractions of the rear guard are about the same as in the case of an
advance guard. If marching at night, the rear guard draws nearer the
main body.

REAR GUARD OF AN ADVANCING FORCE

If there is a possibility that the rear of the column may be attacked, a
rear guard of suitable strength and composition is provided, its conduct
is practically the same as that of the rear guard of a retreating force.
It generally marches in rear of the trains, those organizations
following the combatant troops without distance.

OUTPOSTS

The size and disposition of the outpost will depend upon many
circumstances, such as the size of the whole command, the proximity of
the enemy and the situation with respect to him, the nature of the
terrain, etc.

A suitable strength may vary from a very small fraction to one third of
the whole force. For a single company in bivouac a few sentinels and
patrols will suffice; for a large command a more elaborate outpost
system must be provided. It should be no stronger than is consistent
with reasonable security.

The most economical protection is furnished by keeping close contact
with the enemy by means of outpost patrols, in conjunction with
resisting detachments on the avenues of approach.

The outpost should be composed of complete organizations.

The positions held by the subdivisions of the outpost should generally
be prepared for defense, but conditions may render this unnecessary.

Troops on outpost keep concealed as much as is consistent with the
proper performance of their duties; especially do they avoid appearing
on the sky line.

COMPOSITION

A mixed outpost is composed principally of infantry. The infantry is
charged with the duty of local observation, especially at night and with
resisting the enemy long enough for the main body to prepare for action.
The cavalry is charged with the duty of reconnaissance, and is very
useful in open country during the day. If the infantry has been severely
taxed by marching or fighting, a large part of the outpost may be
temporarily formed of cavalry.

Artillery is useful to outposts when its fire can sweep defiles or large
open spaces and w