Kornilov affair
A general marches on Petrograd and ends up aiding the Bolsheviks

In late August 1917 (Old Style) Commander-in-Chief Lavr Kornilov sent General Krymov's troops towards Petrograd, and Kerensky branded him a traitor. To defend the capital the Red Guards were armed and jailed Bolsheviks, Trotsky among them, were freed; Kornilov was arrested and Krymov shot himself.
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Meanwhile around the world (±25 years)
Whole world
- 1914–1918 World War I — 3 years earlier
- 1918–1920 Spanish flu pandemic — 1 year later
- 1920 League of Nations founded — 3 years later
- 1939–1945 World War II — 22 years later
Europe
- 1905 Einstein's miracle year and relativity — 12 years earlier
- 1914 Assassination of Franz Ferdinand — 3 years earlier
- 1919 Treaty of Versailles — 2 years later
- 1928 Discovery of penicillin — 11 years later
- 1933 Hitler comes to power — 16 years later
Middle East
- 1908 Oil struck at Masjed Soleyman — 9 years earlier
- 1915–1917 Armenian genocide — 2 years earlier
- 1916 Sykes–Picot Agreement — 1 year earlier
- 1916–1918 The Arab Revolt — 1 year earlier
- 1917 Balfour Declaration — same year
Africa
- 1898 Battle of Omdurman — 19 years earlier
- 1899–1902 Second Boer War — 18 years earlier
- 1904–1908 The Herero and Nama genocide — 13 years earlier
- 1922 Discovery of Tutankhamun's tomb — 5 years later
- 1935–1937 Italy invades Ethiopia — 18 years later
Asia
- 1911–1912 Xinhai Revolution — 6 years earlier
- 1916–1917 1916 revolt and the Urkun — 1 year earlier
- 1918–1934 Basmachi movement — 1 year later
- 1919 Amritsar massacre — 2 years later
- 1923 Great Kantō earthquake — 6 years later
Americas
- 1913 Ford's moving assembly line — 4 years earlier
- 1914 Opening of the Panama Canal — 3 years earlier
- 1914 Death of Martha, the last passenger pigeon — 3 years earlier
- 1920–1933 Prohibition in the United States — 3 years later
- 1929 Wall Street Crash — 12 years later
Oceania
- 1893 New Zealand women win the vote — 24 years earlier
- 1893 Overthrow of the Hawaiian Kingdom — 24 years earlier
- 1911 Amundsen reaches the South Pole — 6 years earlier
- 1912 The death of Scott's polar party — 5 years earlier
- 1936 Death of the last thylacine — 19 years later
Alive at the time
- Thomas Edison (aged 70)
- Nikola Tesla (aged 61)
- Marie Curie (aged 50)
- Mahatma Gandhi (aged 48)
- Vladimir Lenin (aged 47)
- Ernest Rutherford (aged 46)
- Winston Churchill (aged 43)
- Joseph Stalin (aged 39)
- Albert Einstein (aged 38)
- Pablo Picasso (aged 36)