Of course, in a war an ally is to be desired, all other things being
equal. Although a great state will more probably succeed than two weaker
states in alliance against it, still the alliance is stronger than
either separately. The ally not only furnishes a contingent of troops,
but, in addition, annoys the enemy to a great degree by threatening
portions of his frontier which otherwise would have been secure. All
history teaches that no enemy is so insignificant as to be despised and
neglected by any power, however formidable.





ARTICLE V.

Wars of Intervention.


To interfere in a contest already begun promises more advantages to a
state than war under any other circumstances; and the reason is plain.
The power which interferes throws upon one side of the scale its whole
weight and influence; it interferes at the most opportune moment, when
it can make decisive use of its resources.

There are two kinds of intervention: 1. Intervention in the internal
affairs of neighboring states; 2. Intervention in external relations.

Whatever may be said as to the moral character of interventions of the