Hiroshima and Nagasaki By HH17953 Feb 25, 1942 The Manhattan project Dec 7, 1944 Pearl Harbor Apr 21, 1945 American forces land in Japan Jul 6, 1945 Potsdam Declaration The threataning of japamn for complete and utter destruction Aug 6, 1945 Hiroshima The atomic bomb the Fat Man Aug 9, 1945 Nagasaki The Little Boy Atom bomb was dropped on Nagasaki Aug 15, 1945 Japan Surrenders