Kingdom of Serbs, Croats and Slovenes
The South Slavs unite in what will become Yugoslavia

On 1 December 1918, after Austria-Hungary collapsed, a united South Slav kingdom was proclaimed under Serbia's Karađorđević dynasty. From 1929 it was called Yugoslavia.
Wikipedia (Russian) · Wikipedia (English) · 20th century
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
Eastern Europe & Russia
- 1917 October Revolution — 1 year earlier
- 1917–1922 Russian Civil War — 1 year earlier
- 1929–1933 Collectivization in the Soviet Union — 11 years later
- 1936–1938 Great Purge — 18 years later
- 1941–1944 Siege of Leningrad — 23 years later
Middle East
- 1908 Oil struck at Masjed Soleyman — 10 years earlier
- 1908 Young Turk Revolution — 10 years earlier
- 1915 Armenian genocide — 3 years earlier
- 1916 Sykes–Picot Agreement — 2 years earlier
- 1916–1918 The Arab Revolt — 2 years earlier
Africa
- 1897 The British sack Benin City — 21 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
- 1896–1898 Philippine Revolution — 22 years earlier
- 1911–1912 Xinhai Revolution — 7 years earlier
- 1923 Great Kantō earthquake — 5 years later
- 1931 China floods — 13 years later
- 1934–1935 Long March — 16 years later
Americas
- 1910–1920 Mexican Revolution — 8 years earlier
- 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
- 1929 Wall Street Crash and the Great Depression — 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)