No, says Kautilya, the ally of him who has a powerful army keeps the alliance; and even the enemy assumes a friendly attitude; when there is a work that can be equally accomplished either by the army or by an ally, then preference to the army or to the ally should depend on the advantages of securing the appropriate place and time for war and the expected profit. In times of sudden expedition and on occasions of troubles from an enemy, a wild tribe, or local rebels, no friend can be trusted. When calamities happen together, or when an enemy has grown strong, a friend keeps up his friendship as long as money is forthcoming. Thus the determination of the comparative seriousness of the calamities of the various elements of sovereignty.