Red Terror
After the shot at Lenin, the Cheka may execute without trial

On 5 September 1918 the Sovnarkom decreed the Red Terror: 'class enemies' were to be isolated in concentration camps and anyone linked to White plots shot. It followed Fanny Kaplan's attempt on Lenin and the killing of Petrograd Cheka chief Uritsky on 30 August; 10,000–15,000 people were executed in the first two months.
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Meanwhile around the world (±25 years)
Whole world
- 1914–1918 World War I — 4 years earlier
- 1918–1920 Spanish flu pandemic — same year
- 1920 League of Nations founded — 2 years later
- 1939–1945 World War II — 21 years later
- 1943 Tehran Conference — 25 years later
Europe
- 1905 Einstein's miracle year and relativity — 13 years earlier
- 1914 Assassination of Franz Ferdinand — 4 years earlier
- 1919 Treaty of Versailles — 1 year later
- 1928 Discovery of penicillin — 10 years later
- 1933 Hitler comes to power — 15 years later
Middle East
- 1908 Oil struck at Masjed Soleyman — 10 years earlier
- 1915–1917 Armenian genocide — 3 years earlier
- 1916 Sykes–Picot Agreement — 2 years earlier
- 1918–1921 Democratic Republic of Georgia proclaimed — same year
- 1918–1920 Azerbaijan Democratic Republic proclaimed — same year
Africa
- 1898 Battle of Omdurman — 20 years earlier
- 1899–1902 Second Boer War — 19 years earlier
- 1904–1908 The Herero and Nama genocide — 14 years earlier
- 1922 Discovery of Tutankhamun's tomb — 4 years later
- 1935–1937 Italy invades Ethiopia — 17 years later
Asia
- 1916–1917 1916 revolt and the Urkun — 2 years earlier
- 1918–1934 Basmachi movement — same year
- 1919 Amritsar massacre — 1 year later
- 1923 Great Kantō earthquake — 5 years later
- 1924 National delimitation of Central Asia — 6 years later
Americas
- 1913 Ford's moving assembly line — 5 years earlier
- 1914 Opening of the Panama Canal — 4 years earlier
- 1914 Death of Martha, the last passenger pigeon — 4 years earlier
- 1920–1933 Prohibition in the United States — 2 years later
- 1929 Wall Street Crash — 11 years later
Oceania
- 1893 New Zealand women win the vote — 25 years earlier
- 1911 Amundsen reaches the South Pole — 7 years earlier
- 1912 The death of Scott's polar party — 6 years earlier
- 1936 Death of the last thylacine — 18 years later
- 1941 Attack on Pearl Harbor — 23 years later
Alive at the time
- Thomas Edison (aged 71)
- Nikola Tesla (aged 62)
- Marie Curie (aged 51)
- Mahatma Gandhi (aged 49)
- Vladimir Lenin (aged 48)
- Ernest Rutherford (aged 47)
- Winston Churchill (aged 44)
- Joseph Stalin (aged 40)
- Albert Einstein (aged 39)
- Pablo Picasso (aged 37)