Anglo-Irish Treaty
Ireland becomes a dominion, minus six northern counties
On 6 December 1921, after the War of Independence, Michael Collins and Arthur Griffith signed a treaty in London: 26 counties became the Irish Free State, a dominion with an oath to the king, while Northern Ireland stayed in the United Kingdom. The dispute over it led to civil war.
Wikipedia (Russian) · Wikipedia (English) · 20th century
Meanwhile around the world (±25 years)
Whole world
- 1914–1918 World War I — 7 years earlier
- 1918–1920 Spanish flu pandemic — 3 years earlier
- 1920 League of Nations founded — 1 year earlier
- 1939–1945 World War II — 18 years later
- 1943 Tehran Conference — 22 years later
Eastern Europe & Russia
- 1917 October Revolution — 4 years earlier
- 1917–1922 Russian Civil War — 4 years earlier
- 1929–1933 Collectivization in the Soviet Union — 8 years later
- 1936–1938 Great Purge — 15 years later
- 1941–1944 Siege of Leningrad — 20 years later
Middle East
- 1908 Oil struck at Masjed Soleyman — 13 years earlier
- 1915–1917 Armenian genocide — 6 years earlier
- 1916 Sykes–Picot Agreement — 5 years earlier
- 1919–1922 Greco-Turkish War — 2 years earlier
- 1923 Treaty of Lausanne — 2 years later
Africa
- 1898 Battle of Omdurman — 23 years earlier
- 1899–1902 Second Boer War — 22 years earlier
- 1904–1908 The Herero and Nama genocide — 17 years earlier
- 1922 Discovery of Tutankhamun's tomb — 1 year later
- 1935–1937 Italy invades Ethiopia — 14 years later
Asia
- 1911–1912 Xinhai Revolution — 10 years earlier
- 1919 Amritsar massacre — 2 years earlier
- 1923 Great Kantō earthquake — 2 years later
- 1931 China floods — 10 years later
- 1945 Atomic bombing of Hiroshima — 24 years later
Americas
- 1913 Ford's moving assembly line — 8 years earlier
- 1914 Opening of the Panama Canal — 7 years earlier
- 1914 Death of Martha, the last passenger pigeon — 7 years earlier
- 1929 Wall Street Crash and the Great Depression — 8 years later
- c. 1930–1936 Dust Bowl — 9 years later
Oceania
- 1911 Amundsen reaches the South Pole — 10 years earlier
- 1912 The death of Scott's polar party — 9 years earlier
- 1936 Death of the last thylacine — 15 years later
- 1941 Attack on Pearl Harbor — 20 years later
- 1942 The Battle of Midway — 21 years later
Alive at the time
- Thomas Edison (aged 74)
- Nikola Tesla (aged 65)
- Marie Curie (aged 54)
- Mahatma Gandhi (aged 52)
- Vladimir Lenin (aged 51)
- Ernest Rutherford (aged 50)
- Winston Churchill (aged 47)
- Joseph Stalin (aged 43)
- Albert Einstein (aged 42)
- Pablo Picasso (aged 40)