The Cairo Conference was a meeting between allied World War II leaders British Prime Minister Winston Churchill, US President Franklin D. Roosevelt and Chinese Generalissimo Chiang Kai-shek in Cairo in November 1943.
They discussed their plans regarding how to shape post-war Asia after the imminent Japanese surrender and made a non-binding declaration that Japan will be to return all territories it seized from China, including Taiwan and the Penghu Islands. The Cairo Declaration was later referenced in the Japanese Instrument of Surrender, which is a legally binding document.