connected with preparing, moving, and guarding the _impedimenta_ of an
army.

The officers connected with this branch of service must consult with the
engineers in every thing relating to the defence of their depots,
magazines, camps, cantonments, communications, and the passage of
rivers, and in all that relates to their connection with the attack and
defence of places: but in all that relates to strategy and tactics they
must receive instructions directly from the chief of the staff of the
army, who will have the general direction of every thing connected with
logistics. Before commencing the operations of the campaign, or
beginning the execution of the plans decided upon at head-quarters,
this officer should satisfy himself respecting the condition of the
various materials belonging to the different departments of the
army;--the horses and horse equipments, carriages, caissons, ponton and
artillery equipages, siege equipages, moveable hospitals, engineer and
artillery utensils, clothing, and munitions of all kinds; he must supply
whatever may be wanting, and provide means for the transportation of
every thing.

_Subsistence_.--The art of subsisting troops during active operations in
a hostile country, is one of the most difficult subjects connected with
war; and it is a question well worthy of study, both for the statesman
and the warrior, how Darius and Xerxes, Philip and Alexander, in ancient
times--and the Greek emperors and the barbarians--and, later still, the
crusaders of the middle ages, contrived to support the immense masses of
men which they led to war.

Cæsar has said that war should be made to support war; and some modern
generals have acted upon this principle to the extreme of supporting