In July 1945, China, the US and the UK issued the Potsdam Proclamation or the Proclamation Defining Terms for Japanese Surrender, a statement which called for the surrender of all Japanese armed forces during World War II. According to Article 8, the terms of the Cairo Declaration shall be carried out and Japan shall return all territories it illegally invaded. The Article, in explicit terms, also stipulated Japan’s legal territory. The Soviet Union signed the Potsdam Proclamation in August 1945 after it declared war on Japan.