Are Americans today war-weary? Sure. The Iraq and Afghanistan wars have been frustrating and tiring. Are Americans today unusually war-weary? No. They were wearier after the much larger and even more frustrating conflicts in Korea and Vietnam. And even though the two world wars of the last century had more satisfactory outcomes, their magnitude was such that they couldn’t help but induce a significant sense of war-weariness. And history shows that they did.