Shortly after the end of World War II, the United States occupied Japan alone, and MacArthur clearly declared that the ultimate goal of occupying Japan was to "ensure that Japan no longer poses a threat to the peace and security of the United States and the world." This shows that the American policy toward Japan in the early days of occupation was non-militaristic and democratic, and measures such as dissolving the Japanese army, arresting war criminals, and carrying out military strikes against Japan were taken successively. Deprive militarist leaders and professional soldiers of public office, purge a group of far-right politicians, restore Japan's legal status and dissolve. However, with the total cold war between the United States and the Soviet Union and the sudden change of the international situation, the American policy toward Japan has also undergone major changes, from containment to support, cultivating a strong Japanese government and rearming Japan, making it a deep charge and an Asian ally in the American anti-communist strategy.