Frederick has remarked that, in order to be assured that your camp is
well placed, you should see if, by making a small movement, you can
oblige the enemy to make a greater; or, if after having forced him to
retrograde one march you can compel him to fall back another.
In defensive war, all camps should be entrenched in the front and
wings of the position they occupy, and care should be taken that the
rear is left perfectly open. If you are threatened with being turned,
arrangements should be made beforehand for taking up a more distant
position; and you should profit by any disorder in the enemy’s line of
march, to make an attempt upon his artillery or baggage.