WHAT ALL HAPPENED FEBRUARY TO DECEMBER 1939
Find out what all happened February to December 1939

Spanish Civil War: The Nationalists conclude their conquest of Catalonia and seal the border with France. (10. February 1939)

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

General George C. Marshall becomes Chief of Staff of the United States Army. (1. September 1939)

Adolf Hitler signs an order to begin the systematic euthanasia of mentally ill and disabled people. (1. September 1939)

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

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

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

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

Faisal II becomes King of Iraq. (4. April 1939)

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

World War II: U.S. President Franklin D. Roosevelt orders the United States Customs Service to implement the Neutrality Act of 1939, allowing cash-and-carry purchases of weapons by belligerents. (4. November 1939)

World War II: German troops occupy the remaining part of Bohemia and Moravia; Czechoslovakia ceases to exist. (15. March 1939)

From Prague Castle, Hitler proclaims Bohemia and Moravia a German protectorate. (16. March 1939)

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

The erroneous word "dord" is discovered in the Webster's New International Dictionary, Second Edition, prompting an investigation. (28. February 1939)

Marriage of Princess Fawzia of Egypt to Shah Mohammad Reza Pahlavi of Iran. (16. March 1939)

Shelling of Mainila: The Soviet Army orchestrates an incident which is used to justify the start of the Winter War with Finland four days later. (26. November 1939)

World War II: First attack on British territory by the German Luftwaffe. (16. October 1939)