An unpleasant truth often overlooked is that although war is a great evil, it does have a great virtue: it can resolve political conflicts and lead to peace. This can happen when all belligerents become exhausted or when one wins decisively. Either way the key is that the fighting must continue until a resolution is reached. War brings peace only after passing a culminating phase of violence. Hopes of military success must fade for accommodation to become more attractive than further combat.
Since the establishment of the United Nations and the enshrinement of great-power politics in its Security Council, however, wars among lesser powers have rarely been allowed to run their natural course. Instead, they have typically been interrupted early on, before they could burn themselves out and establish the preconditions for a lasting settlement. Cease-fires and armistices have frequently been imposed under the aegis of the Security Council in order to halt fighting. NATO's intervention in the Kosovo crisis follows this pattern.
But a cease-fire tends to arrest war-induced exhaustion and lets belligerents reconstitute and rearm their forces. It intensifies and prolongs the struggle once the cease-fire ends -- and it does usually end. This was true of the Arab-Israeli war of 1948-49, which might have come to closure in a matter of weeks if two cease-fires ordained by the Security Council had not let the combatants recuperate. It has recently been true in the Balkans. Imposed cease-fires frequently interrupted the fighting between Serbs and Croats in Krajina, between the forces of the rump Yugoslav federation and the Croat army, and between the Serbs, Croats, and Muslims in Bosnia. Each time, the opponents used the pause to recruit, train, and equip additional forces for further combat, prolonging the war and widening the scope of its killing and destruction. Imposed armistices, meanwhile -- again, unless followed by negotiated peace accords -- artificially freeze conflict and perpetuate a state of war indefinitely by shielding the weaker side from the consequences