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World War II Technology Mid 1930s – 1940s Franklin D. Roosevelt, US President during The Great Depression & during WWII Winston Churchill, Britain's Prime Minister during WWII Adolf Hitler, Fuhrer of Germany during WWII In 1932, the Enigma code is first broken by a Polish team of mathematicians. In 1940, the British at Bletchley Park break the Enigma code again after the Germans had changed it frequently since the beginning of World War II in 1939. In 1941, the British at Bletchley Park break the German Lorenz cipher machine code. On May 7, 1974 the Germans surrender to the Allied Forces. http://www.calvin.edu/academic/cas/gpa/ah-art.htm, German Propaganda Archive; portraits of Hitler http://www.fotw.ca/flags/, FOTW Flags Of The World website; images of WWII flags http://www.fdrlibrary.marist.edu/photos.html Marist College FDR Library; photo of FDR. http://www.nsa.gov/museum/enigma.html The National Security Agency; photo of the Enigma cipher machine & of the Sigaba cipher machine. http://www.archives.gov/exhibit_hall/a_people_at_war/a_people_at_war.html U.S. National Archives & Records Administration; photo of flag raising at Iwo Jima. Guerrero