May 8, 1945 - V-E Day, Victory in Europe. The war in Europe is officially over.
July 16, 1945 - First successful test of the atomic bomb in Alamogordo, New Mexico.
July 29, 1945 - President Harry Truman warns Japan that the country will be destroyed if it does not surrender unconditionally. Japan continues fighting.
August 6, 1945 - The first atomic bomb used in warfare, nicknamed Little Boy, is dropped on the Japanese city of Hiroshima, killing up to 140,000 people.
August 9, 1945 - After getting no response from the Japanese government after the Hiroshima bombing, a second atomic bomb, nicknamed Fat Man, is dropped on Nagasaki, killing up to 80,000 people.
August 14, 1945 - Japan unconditionally agrees to accept the terms of the Potsdam Declaration and end the war. V-J Day, Victory over Japan is declared.
September 2, 1945 - Japan signs the formal surrender aboard the USS Missouri in Tokyo Bay.