Corps d’armee are _in Contact_ with each other whenever their logistic
radii intersect; or, their radii offensive and the corresponding adverse
radii defensive are opposed to each other.
Corps d’armee are _in Presence_ whenever the posts which they occupy are
contained within the same Strategic front, the same Strategetic Horizon,
or are in communication with their corresponding posts of mobilization,
development, or manoeuvre.
Corps d’armee are _at Distance_ when the posts which they occupy are not
in communication with Kindred Corps d’armee posted upon the strategic
front adopted, or with posts of mobilization or development contained
within the corresponding Primary Base of Operations, or, within the True
Strategetic Horizon.