The Manhattan Project

  • Germany invades Austria

  • German starts research on bomb

    Gereman scientists Lise Meitner and otto Frisch identify fission in uranium atoms.
  • Einstein writes letter to Roosevelt

    Two scientists, Leo Szilard and Eugene Wigner ask Albert Einstein to write to President Roossevelt, explaing that a powerful new weapon might be possible.
  • WWII begins

    Germany invades Poland; Great Britain and France declare war on Germany.
  • President orders investigation

    President Roosevelt orders a committee to investigate the possibility of creating atomic bomb.
  • The United States enter the war

  • Roosevelt orders the army to build the atomic bomb

  • Selects Los Alamos, New Mexico, as the site to build the bomb.

  • Los Alamos Laboratory opens under Robert Oppenheimer

  • Italy surrenders

  • Germany surrenders

  • Truman becomes the President

  • Allies demand Japan to surrender

    Allies issued Potsdam Decleration, demanding Japan to surrender
  • Japan rejects to surrender

  • Atomic bomb dropped on Hiroshima

  • Second atomic bomb is dropped on Nagasaki

  • World War II ends