"Kim Il-sung survived in power throughout the Korean War and after and, indeed, for the rest of his life. Because U.S. troops had withdrawn from South Korea in 1949, and because Dean Acheson had declared South Korea outside the U.S. defense perimeter, Kim Il-sung considered America's intervention in the war treacherous and made sure every subsequent generation of North Koreans to be murderous devils. This was an easy sell because the North Korean people had suffered so horribly from American bombs, napalm, bullets, and bayonets. Kim was also humiliated that he had to rely on the Chinese and the Soviets to be saved. He took it out on his own people, purging all members of the military and the government whom he considered possible opponents."