the 6th line at Stettin,
Custrin, and Glogau. When the army left Moscow it carried with it
provisions sufficient for twenty days, and an abundance of ammunition,
each piece of artillery being supplied with three hundred and fifty
rounds; but the premature cold weather destroyed thirty thousand horses
in less than three days, thus leaving the trains without the means of
transportation or suitable escorts for their protection: the horrible
sufferings of the returning army now surpassed all description.

The officer selected to escort convoys should be a man of great
prudence, activity, and energy, for frequently very much depends upon
the safe and timely arrival of the provisions and military stores which
he may have in charge.

_Castrametation_.--Castrametation is, strictly speaking, the art of
laying out and disposing to advantage the several parts of the camp of
an army. The term is sometimes more extensively used to include all the
means for lodging and sheltering the soldiers during a campaign, and all
the arrangements for cooking, &c., either in the field or in winter
quarters. A camp, whether composed of tents or barracks, or merely
places assigned for bivouacking, must be divided and arranged in such a
way that the several divisions shall be disposed as they are intended to
be drawn up in order of battle; so that, on any sudden alarm, the troops
can pass from it promptly, and form their line of battle without
confusion. Suitable places must also be assigned for cooking, for
baggage, and for provisions, military stores, and ammunitions.

The extent of the color front of a camp depends much on the character of
the ground and the means of defence, but as a general rule, it should
never exceed the position which the army would occupy in the line of
battle. The different arms should be encamped in the same order as that
of battle; this order of course depending on the nature of the
battle-ground. A _corps d'armee_ is composed of battalions of infantry,
squadrons of cavalry, batteries of artillery, and companies of engineer
troops, and the art of encampments consists in arranging each of these
elements so as to satisfy the prescribed conditions.

The choice of ground for a camp must be governed, 1st, by the general
rules respecting military positions, and, 2d, by other rules peculiar to
themselves, for they may be variously arranged in a manner more or less
suitable on the same position.

That the ground be suitabl