Five rules that people should keep in mind when their nation goes to fight a war:
1. You never win the war that you start out to fight, because as the fighting progresses, the war evolves into something else.
2. The war is not won on the battlefield but in the postwar negotiations. Your nation might win the war, but lose heavily during the postwar negotiations.
3. The large-scale war rarely leads to sustainable peace—it usually leads to a series of smaller wars and a cold war in which the belligerent nations continue their geopolitical contest.
4. There aren’t any innocent bystanders in a war. Civilians in all the nations that are fighting in the war are a target.
5. No war plan survives the first contact with the enemy.