President Truman had the urge to use the atomic bomb against Japan because the American casualties would continuously rise unless the Empire of Japan surrenders. The thing that would make Japan surrender would be a cataclysmic event, and the bombing of Hiroshima and Nagasaki happened.
Answer:
Treaty of Versailles
On the day of June 28, 1919, the Allied Nations and Germany signed the TREATY OF VERSAILLES
This answer to this problem is 64