WWII Timeline By dxperoa 1931 Star Spangled Banner becomes the countries of official national anthem 1931 Grasshopper outbrak in Nebraska, South Dakota, and Iowa 1932 Amelia Earhart becomes the first woman to fly solo across the Atlantic Ocean 1932 Franklin D. Roosevelt becomes president 1933 Adolf Hitler becomes chancellor of Germany 1936 Hoover Dam is completed 1938 Germany, Japan, and Italy withdraw from the League of Nations 1938 Congress passes the Fair Labor Standards Act 1939 Germany invades Poland. Great britain declares war on Germany. 1939 Oil is discovered in the southeastern Nebraska Jul 5, 1940 Battle of Britain Jun 26, 1941 Mount Rushmore was completed Dec 7, 1941 Japanese attacks Pearl Harbor Jul 5, 1942 Anne Frank goes into hiding Mar 11, 1945 First computer built Apr 12, 1945 Franklin D. Roosevelt dies May 7, 1945 Germans Surrender Aug 6, 1945 U.S. drops atomic bombs on Japan Sep 28, 1945 Microwave ovens invented Oct 24, 1945 United Nations was founded Dec 30, 1945 Adolf Hitler commits suicide Apr 25, 1948 Ghandi's Assasination May 4, 1950 First organ transplant (Kidney) Jun 25, 1950 Korean War begins May 4, 1952 Immigration and Naturalization Act Mar 5, 1953 Joseph Stalin dies May 4, 1953 DNA discovered 1954 Brown vs Board of Education Jan 24, 1954 First Atomic Submarine Jun 4, 1954 Racial Segregation Ruled May 14, 1955 Warsaw Pact signed Nov 1, 1955 Vietnam War Begins