World War 2 This war fought in Europe, North Africa and Asia started in 1939 with the invasion of Poland by Nazi Germany and ended in 1945 with the dropping of two atomic bombs on Japan. It was the largest armed conflict in history.
The german Enigma machine used to encrypt/decrypt secret messages during World War II. Cracked by Alan Turing and teams of mathematicians, cryptologists, and technologists at Bletchley Park based on previous work and discoveries in Poland and France.
German poster displayed in Poland stating that “The German soldier is the guarantor of victories.” Here, the Soviet Union becomes a ravening wolf, the American eagle a balding vulture, and Britain a snake.