guarding of camps is a very important matter, and requires much
attention.
The _camp-guard_ consists of one or two rows of sentinels placed around
the camp, and relieved at regular intervals. The number of rows of
sentinels, and the distance between each man, will depend upon the
character of the ground and the degree of danger apprehended.
Detachments of infantry and cavalry, denominated picquets, are also
thrown out in front and on the flanks, which, in connection with the
camp-guards, serve to keep good order and discipline in and around the
camp, to prevent desertions, intercept reconnoitering parties, and to
give timely notice of the enemy's approach.
Still larger detachments, denominated _grand-guards_, are posted in the
surrounding villages, farm-houses, or small field-works, which they
occupy as outposts, and from which they can watch the movements of the
enemy, and prevent any attempts to surprise the camp. They detach
patrols, videttes, and sentries, to furnish timely notice of danger.
They should never be so far from the camp as to be beyond succor in case
of sudden attack. Outposts, when too far advanced, are sometimes
destroyed without being able to give notice of the enemy's approach.
In encamping troops in winter-quarters, it is sometimes necessary to
scatter them over a considerable extent of ground, in order to
facilitate their subsistence. In such a case, the arrangement of guards
requires the utmost care. A chain of advanced posts should be placed
several miles' distance from the line of camp; these posts should be
supported by other and larger detachments in their rear, and
concentrated on fewer points; and the whole country around should be
continually reconnoitered by patrols of cavalry.
The manner in which Napoleon quartered and wintered his army on the
Passarge, in 1806-7, furnishes a useful lesson to military men, both in
the matters of encampment and subsistence. An immense army of men were
here quartered and subsisted, in a most rigorous climate, with a not
over fertile soil, in the midst of hostile nations, and in the very face
of a most powerful enemy.
A Roman army invariably encamped in the same order, its troops being
always drawn up in the same battle array. A Roman staff-officer who
marked out an encampment, performed nothing more than a mechanical
operation; he had no occasion for much genius or experience. The form of
the camps was a square. In later times, they sometimes,
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