WHAT HAPPENED IN 1939.
Look what happened the 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)

Switzerland mobilizes its forces and the Swiss Parliament elects Henri Guisan to head the Swiss Army (an event that can happen only during war or mobilization). (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: following the start of the invasion of Poland the previous day, the Free City of Danzig (now Gdańsk, Poland) is annexed by Nazi Germany. (2. September 1939)

World War II: France, the United Kingdom, New Zealand and Australia declare war on Germany after the invasion of Poland, forming the Allies. (3. September 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 Bristol Blenheim is the first British aircraft to cross the German coast following the declaration of war and German ships are bombed. (4. September 1939)

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

World War II: South Africa declares war on Germany. (6. September 1939)

World War II: The Battle of Hel begins, the longest-defended pocket of Polish Army resistance during the German invasion of Poland. (9. September 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: 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)

World War II: Canada declares war on Nazi Germany, joining the Allies – France, the United Kingdom, New Zealand and Australia. (10. September 1939)

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

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

World War II: A German U-boat U 29 sinks the British aircraft carrier HMS Courageous. (17. September 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: Polish government of Ignacy Mościcki flees to Romania. (18. September 1939)

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