MEANS LEFT BY WHICH A THEORY IS POSSIBLE (THE DIFFICULTIES ARE NOT EVERYWHERE EQUALLY GREAT).
Two means present themselves of getting out of this difficulty.

In the first place, what we have said of the nature of military action in general does not apply in the same manner to the action of every one, whatever may be his standing.

In the lower ranks the spirit of self-sacrifice is called more into request, but the difficulties which the understanding and judgment meet with are infinitely less.

The field of occurrences is more confined.

Ends and means are fewer in number.
Data more distinct; mostly also contained in the actually visible.