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Iran 6/27/1940 Germans Begin Using Enigma The Germans in occupied French territory set up two-way radio communication using Enigma to transmit coded information during World War II.United States 7/20/1940 Billboard's First Single Chart Billboard published its first singles record chart. The number one spot was "I'll Never Smile Again" by Tommy Dorsey and sung by Frank Sinatra. American President Franklin D Roosevelt (3/4/1933-4/12/1945) British Prime Minister Winston Churchill (5/10/1940-7/26/1945) German President Adolf Hitler (8/2/1934-4/30/1945)