After the Surrender of Japan on 25 October 1945, the US Navy ferried ROC troops to Taiwan to accept the formal surrender of Japanese military forces in Taipei on behalf of the Allied Powers, as part of General Order No. 1 for temporary military occupation. General Rikichi Andō, governor-general of Taiwan and commander-in-chief of all Japanese forces on the island, signed the receipt and handed it over to General Chen Yi of the ROC military to complete the official turnover. Chen Yi proclaimed that day to be "Taiwan Retrocession Day", but the Allies considered Taiwan and the Penghu Islands to be under military occupation and still under Japanese sovereignty until 1952, when the Treaty of San Francisco took effect.