WHAT ALL HAPPENED APRIL TO OCTOBER 1939
Find out what all happened April to October 1939

World War II: Germany annexes Western Poland. (8. October 1939)

Lina Medina becomes the youngest confirmed mother in medical history at the age of five. (14. May 1939)

The Japanese Mitsubishi G4M twin-engine "Betty" Bomber makes its maiden flight. (23. October 1939)

The New York Municipal Airport (later renamed LaGuardia Airport) is dedicated. (15. October 1939)

First flight of the German Focke-Wulf Fw 190 fighter-bomber airplane. (1. June 1939)

The first commercial FM radio station in the United States is launched in Bloomfield, Connecticut. The station later becomes WDRC-FM.[citation needed ] (13. May 1939)

World War II: Germany's invasion of Poland ends with the surrender of Polesia army after the Battle of Kock (6. October 1939)

NBC inaugurates its regularly scheduled television service in New York City, broadcasting President Franklin D. Roosevelt's N.Y. World's Fair opening day ceremonial address. (30. April 1939)

Huỳnh Phú Sổ founds Hòa Hảo Buddhism. (4. July 1939)

Last public guillotining in France: Eugen Weidmann, a convicted murderer, is guillotined in Versailles outside the Saint-Pierre prison (17. June 1939)

Pope Pius XII publishes his first major encyclical entitled Summi Pontificatus. (20. October 1939)

World War II: A German U-boat U 29 sinks the British aircraft carrier HMS Courageous. (17. September 1939)

World War II: The Soviet Union joins Nazi Germany's invasion of Poland during the Polish Defensive War of 1939. (17. September 1939)

Shooting begins on Paramount Pictures' Dr. Cyclops, the first horror film photographed in three-strip Technicolor. (12. June 1939)

Adolf Hitler's 50th birthday is celebrated as a national holiday in Nazi Germany. (20. April 1939)

Taisto Mäki becomes the first man to run the 10,000 metres in under 30 minutes, in a time of 29:52.6 (17. September 1939)

World War II: Germany and Italy sign the Pact of Steel. (22. May 1939)

World War II: The United Kingdom and France begin a naval blockade of Germany that lasts until the end of the war. This also marks the beginning of the Battle of the Atlantic. (3. September 1939)

World War II: The Estonian military boards the Polish submarine ORP Orzeł in Tallinn, sparking a diplomatic incident that the Soviet Union will later use to justify the annexation of Estonia. (14. September 1939)

Holocaust: The MS St. Louis, a ship carrying 963 Jewish refugees, is denied permission to land in Florida, in the United States, after already being turned away from Cuba. Forced to return to Europe, more than 200 of its passengers later die in Nazi concentration camps. (4. June 1939)