The Nuremberg and Tokyo Trials were based on the London Agreement, signed on August 8, 1945, which was an accord between the United States, Great Britain, France, and the Soviet Union to establish an International Military Tribunal to prosecute the major war criminals of the European Axis. It provided a legal framework that codified crimes against peace, war crimes, and crimes against humanity, laying the foundation for the Nuremberg and Tokyo Trials.

Beginning on November 20, 1945, 22 Nazi officials were brought to trial in the city of Nuremberg in Germany. And on May 3, 1946, 28 Japanese Military and Civil Leaders were brought to trial in Tokyo.