After the defeat of Japan in World War II, the United States led the Allies in the occupation and rehabilitation of the Japanese state. Between 1945 and 1952, the U.S. occupying forces, led by General Douglas A. MacArthur enacted widespread military, political, economic, and social reforms
Building the Berlin Wall, preventing trains from traveling through east Germany. Stopping cars from getting through.
They were laws in the early history of the American south which legalized the segregation between blacks and whites.