Potsdam Declaration

The Potsdam Declaration, or the Proclamation Defining Terms for Japanese Surrender, was a statement that called for the surrender of all Japanese armed forces during World War II. 
On July 26, 1945, United States President Harry S. Truman, United Kingdom Prime Minister Winston Churchill, and Chairman of China Chiang Kai-shek issued the document. It talked about the terms of surrender for the Empire of Japan. These terms were first talked about during the Potsdam Conference. 
The declaration said if Japan did not surrender, it would face "prompt and utter destruction."