WHAT ALL HAPPENED JUNE TO NOVEMBER 1939
Find out what all happened June to November 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)

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)

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)

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

Warsaw surrenders to Nazi Germany during World War II. (28. 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: The Battle of Hel begins, the longest-defended pocket of Polish Army resistance during the German invasion of Poland. (9. September 1939)

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

World War II: Germany and the Soviet Union sign a non-aggression treaty, the Molotov-Ribbentrop Pact. In a secret addition to the pact, the Baltic states, Finland, Romania, and Poland are divided between the two nations. (23. August 1939)

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

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

Venlo Incident: Two British agents of SIS are captured by the Germans. (8. November 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: Nazi Germany and Slovakia invade Poland, beginning the European phase of World War II. (1. September 1939)

Judge Joseph Force Crater, known as the "Missingest Man in New York", is declared legally dead. (6. June 1939)

The Wizard of Oz premieres at Grauman's Chinese Theater in Los Angeles, California. (15. August 1939)

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

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

After a one-month Siege of Warsaw, hostile Nazi forces enter the city. (1. October 1939)

General Władysław Sikorski becomes commander-in-chief of the Polish Government in exile. (30. September 1939)