From the Wikipedia article you linked: > Lesson #5: Proportionality should be a guideline in war. > McNamara talks about the proportions of cities destroyed i

From the Wikipedia article you linked: > Lesson #5: Proportionality should be a guideline in war. > McNamara talks about the proportions of cities destroyed in Japan by the US before the dropping of the nuclear bomb, comparing the destroyed Japanese cities to similarly-sized cities in the US: Tokyo, roughly the size of New York City, was 51% destroyed; Toyama, the size of Chattanooga, was 99% destroyed; Nagoya, the size of Los Angeles, was 40% destroyed; Osaka, the size of Chicago, was 35% destroyed; Kobe, the size of Baltimore, was 55% destroyed; etc. He says LeMay once said that, had the United States lost the war, they would have been tried for war crimes, and agrees with this assessment.