WHAT ALL HAPPENED APRIL TO SEPTEMBER 1939
Find out what all happened April to September 1939

World War II: Polish government of Ignacy Mościcki flees to Romania. (18. September 1939)

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

Warsaw surrenders to Nazi Germany during World War II. (28. September 1939)

World War II: The Battle of Kępa Oksywska concludes, with Polish losses reaching roughly 14% of all the forces engaged. (19. September 1939)

World War II: Italy invades Albania. (7. April 1939)

World War II: Nazi Germany and Slovakia invade Poland, beginning the European phase of World War II. (1. September 1939)

The 1939-40 New York World's Fair opens. (30. April 1939)

The Canadian National War Memorial is unveiled by King George VI and Queen Elizabeth in Ottawa. (21. May 1939)

World War II: The Battle of Barking Creek. (6. September 1939)

Burmese national hero U Ottama dies in prison after a hunger strike to protest Britain's colonial government. (9. September 1939)

Billie Holiday records the first civil rights song "Strange Fruit". (20. April 1939)

World War II: The submarine HMS Oxley is mistakenly sunk by the submarine HMS Triton near Norway and becomes the Royal Navy's first loss. (10. September 1939)

The U.S. Navy submarine USS Squalus sinks off the coast of New Hampshire during a test dive, causing the death of 24 sailors and two civilian technicians. The remaining 32 sailors and one civilian naval architect are rescued the following day. (23. May 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)

The Columbia Lions and the Princeton Tigers play in the United States' first televised sporting event, a collegiate baseball game in New York City. (17. 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: A German U-boat U 29 sinks the British aircraft carrier HMS Courageous. (17. September 1939)

Romanian Prime Minister Armand Călinescu is assassinated by far-right legionnaires of the fascist paramilitary organization called the Iron Guard. (21. September 1939)