Today, the U.S. commemorates Pearl Harbor without mentioning Japan, while Japan commemorates Hiroshima without mentioning the U.S. The U.S. and Japan join hands to commemorate Iwo Jima, which surprisingly turns into a narrative of fighting side by side. When Americans, under the guise of happy education, question China about why it attacked Pearl Harbor, and when the younger generation in Japan believes they are purely victims of the atomic bomb while denying aggression and the Holocaust, the peace order established after World War II is already on shaky ground, and the repetition of history begins with the failure to learn from historical lessons.