Japanese in the geography book of the second day of Ryukyu Islands.

During the Pacific War, the US military launched a landing campaign against the Japanese in the Ryukyu Islands from March to June. 1945. The United States occupied the Ryukyu Islands and wiped out the Japanese invaders on the Ryukyu Islands. According to the division of labor of the Allies, the China administration also severely attacked and annihilated the last crazy Japanese invaders and the Japanese troops who made expeditions to Myanmar on the domestic battlefield, and the task of recovering the sovereignty of the Ryukyu Islands was completed by the American Allies rather than China. From March of 1945 to June of 197 1, during this period, the American allied forces have been fulfilling their obligations, replacing China's temporary management obligations and administering the Ryukyu Islands. The United States has never had the ambition to compete for the sovereignty of the Ryukyu Islands.

From 1945 to 1949, the mainland and Taiwan Province Province were still in a state of civil war, and neither side of the Taiwan Strait had time to recover the administrative power of Ryukyu Islands from the United States and Japan. 195 1 year, the United States signed the so-called San Francisco Peace Treaty with Japan without the consent of China, and handed over the management of Ryukyu Islands to Japan without authorization, which was invalid. Because according to Article 8 of the Potsdam Proclamation of China, Britain and the United States: "The conditions of the Cairo Declaration will be implemented, and Japan's sovereignty will be limited to Honshu, Hokkaido, Kyushu, Shikoku and other small islands decided by us." This shows that the so-called San Francisco Peace Treaty is invalid! Because both the United States and Japan violated the Cairo Declaration and the Potsdam Proclamation.