WHAT ALL HAPPENED MAY TO OCTOBER 1939
Find out what all happened May to October 1939

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

Joint victory parade of Wehrmacht and Red Army in Brest-Litovsk at the end of the Invasion of Poland. (22. September 1939)

Holocaust: the last remaining Jewish enterprises in Germany are closed. (6. July 1939)

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

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

The German submarine U-47 sinks the British battleship HMS Royal Oak within her harbour at Scapa Flow, Scotland. (14. October 1939)

World War II: Canada declares war on Germany, the country's first independent declaration of war (11. September 1939)

The Wound Badge for Wehrmacht, SS, Kriegsmarine, and Luftwaffe soldiers is instituted. The final version of the Iron Cross is also instituted on this date. (1. September 1939)

Lou Gehrig, recently diagnosed with Amyotrophic lateral sclerosis, informs a crowd at Yankee Stadium that he considered himself "The luckiest man on the face of the earth", then announces his retirement from major league baseball. (4. July 1939)

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

The Nazi propaganda broadcaster known as Lord Haw-Haw begins transmitting. (18. September 1939)

The United Kingdom and Poland form a military alliance in which the UK promises to defend Poland in case of invasion by a foreign power. (25. August 1939)

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

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

Nazi Germany and the Soviet Union agree on a division of Poland after their invasion during World War II. (28. September 1939)

NBC broadcasts the first televised American football game between the Waynesburg Yellow Jackets and the Fordham Rams. Fordham won the game 34-7. (30. September 1939)

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

Albert Einstein and Leó Szilárd write a letter to Franklin D. Roosevelt, urging him to begin the Manhattan Project to develop a nuclear weapon. (2. August 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)