WHAT ALL HAPPENED SEPTEMBER TO DECEMBER 1917
Find out what all happened September to December 1917

Joseph Stalin enters the provisional government of Bolshevik Russia. (9. November 1917)

The People's Commissars give authority to Vladimir Lenin, Leon Trotsky, and Joseph Stalin. (8. November 1917)

Cheka, the first Soviet secret police force, is founded. (20. December 1917)

The National Hockey League is formed, with the Montreal Canadiens, Montreal Wanderers, Ottawa Senators, Quebec Bulldogs, and Toronto Arenas as its first teams. (26. November 1917)

The Gregorian calendar date of the October Revolution, which gets its name from the Julian calendar date of 25 October. On this date in 1917, the Bolsheviks storm the Winter Palace. (7. November 1917)

Russia is officially proclaimed a republic. (14. September 1917)

In Milwaukee, Wisconsin, 9 members of the Milwaukee Police Department are killed by a bomb, the most deaths in a single event in U.S. police history until the September 11 attacks in 2001. (24. November 1917)

Halifax Explosion: A munitions explosion near Halifax, Nova Scotia kills more than 1,900 people in the largest artificial explosion up to that time. (6. December 1917)

The Battle of Broodseinde fought between the British and German armies in Flanders. (4. October 1917)

The Balfour Declaration proclaims British support for the "establishment in Palestine of a national home for the Jewish people" with the clear understanding "that nothing shall be done which may prejudice the civil and religious rights of existing non-Jewish communities". (2. November 1917)

Finland declares independence from Russia. (6. December 1917)

St. Tikhon of Moscow is elected the Patriarch of Moscow and of the Russian Orthodox Church. (5. November 1917)

First British bombing of Germany in World War I. (17. October 1917)

World War I: The United States declares war on Austria-Hungary. (7. December 1917)

World War I: British General Edmund Allenby enters Jerusalem on foot and declares martial law. (11. December 1917)

World War I: Battle of Caporetto; Italy suffers a catastrophic defeat at the forces of Austria-Hungary and Germany. The young unknown Oberleutnant Erwin Rommel captures Mount Matajur with only 100 Germans against a force of over 7000 Italians. (26. October 1917)

In Nebraska, Father Edward J. Flanagan founds Boys Town as a farm village for wayward boys. (12. December 1917)

World War I: German forces defeat Portuguese army of about 1200 at Negomano on the border of modern-day Mozambique and Tanzania. (25. November 1917)

World War I: Brazil declared in state of war with Central Powers. (26. October 1917)

World War I: USS Jacob Jones is the first American destroyer to be sunk by enemy action when it is torpedoed by German submarine SM U-53. (6. December 1917)