The Korean War marked the end of the "Fortress America" era in the United States, and at the same time, it marked the beginning of a new era. In this new era, the United States could no longer simply avoid disputes with the outside world to achieve peace. When the war broke out in Korea, we were forced to hastily participate in the conflict with less than a week's warning, becoming involved in a struggle on the other side of the world that our people neither understood nor felt. This was the first time in our history...