Timeline

August 2, 1939- Scientist Albert Einstein and Leo Szilard write a letter to President Roosevelt informing him about the bomb (Destroyer of Worlds...)

September 1, 1939- Nazi Germany invades Poland and World War Two begins

October 1939- The Advisory Commitee on Uranium (TACU) is established (Committee on Uranium)

October 21, 1939- The first TACU meeting is held (The Uranium Commitee)

December 7, 1941- Japan attacks Pearl Harbor, Hawaii

December 8, 1941- America enters World War Two (America Enters World War II...)

August 1942- The Army Corps of Engineers (TACE) enters into the Manhattan Project (America's Entry into World War II)

December 28, 1942- President Franklin Roosevelt approves the Manhattan Project (Final Approval to Build the Bomb)

January 1, 1943- The Los Alamos Laboratory (Project Y) is established (Establishing Los Alamos)

July 16, 1945- The first atomic bomb is dropped in Almagordo, New Mexico (Destroyer of Worlds...)

July 26, 1945- From Potsdam, Germany an ultmatum to surrender or face the consequences is given to Japan, the Japanese refuse surrender (Surrender of Japan 1945)

August 6, 1945- Atomic bomb codenamed "Little Boy" was dropped on Hiroshima by Colonel Paul Tibbets and the crew of the "Enola Gay" (The Atomic Bombing of Japan)

August 8, 1945- The USSR declares war on Japan (Soviets declare war on Japan...)

August 9, 1945- Atomic bomb codenamed "Fat Man" was dropped on Nagasaki by Charles Sweeney and the crew of "Bockscar" (The Atomic Bombing of Japan)

August 10, 1945- Japanese leader Emperor Hirohito offers to surrender (Japan Surrenders)

September 2, 1945- Japanese representatives signs the instrument of surrender aboard the USS Missouri, bringing a close to the war (Surrender of Japan 1945)