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Date |
Event(s) |
| 1 | 1913 | - 4 Mar 1913—3 Mar 1921: Woodrow Wilson, 28th President of the United States
 Woodrow Wilson
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| 2 | 1916 | |
| 3 | 1917 | - 1917: Battle of Cambrai
- 1917: Ministry of Labour is established in Britain
- Feb 1917: February revolution in Russia; Tsar Nicholas abdicates
- 6 Apr 1917: World War I
- 16 Apr 1917: Lenin returns to Russia after exile
- 17 Apr 1917: USA declares war on Germany
- 26 May 1917: George V changes surname from Saxe-Coburg-Gotha to Windsor (Royal
proclamation on 17 July)
- Jul 1917: Battle of Passchendaele
- 7 Nov 1917: 'October' Revolution in Russia
- 6 Dec 1917: Halifax (Nova Scotia) Explosion, one of the world's largest artificial non-nuclear
explosions to date: a ship loaded with wartime explosives blew up after a collision,
obliterating buildings and structures within two square kilometres of the explosion
- 9 Dec 1917: British forces capture Jerusalem
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| 4 | 1918 | - 1918: Vote for women over 30, men over 21 (except peers, lunatics and felons)
- 1918: War of Independence in Ireland
- 1918: Epidemic
The Spanish flu caused over 20 million deaths worldwide
- 18 Jan 1918: Bentley Motors founded
- 8 Mar 1918: Start of world-wide 'flu pandemic
- Jul 1918: Second Battle of the Marne: last major German offensive in WW1 (Jul-Aug)
- 1 Oct 1918: Arab forces under Lawrence of Arabia capture Damascus
- 11 Nov 1918: Armistice signed
- Dec 1918: First woman elected to House of Commons, Countess Markiewicz as a Sinn F
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| 5 | 1919 | - 1919: Britain adopts a 48-hour working week
- 1919: Sir Ernest Rutherford publishes account of splitting the atom
- 15 Jun 1919: Alcock and Brown complete first nonstop flight across the Atlantic
- 28 Jun 1919: Treaty of Versailles signed
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| 6 | 1920 | - 1920: Regular cross-channel air service starts
- 1920: Marconi opens a radio broadcasting station in Britain
- 1920: Thompson patents his machine gun (Tommy gun)
- Feb 1920: First roadside petrol filling station in UK
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| 7 | 1921 | - 1921: Railway Act in Britain amalgamates companies
- 1921: Insulin discovery announced
- 1921: First birth control clinic
- 4 Mar 1921—2 Aug 1923: Warren Gamaliel Harding, 29th President of the United States
 Warren Gamaliel Harding
- 19 Jun 1921: Census: Population - England and Wales: 37.9 Million; Scotland: 4.9 Million; N Ireland: 1.25 Million
- 6 Dec 1921: Anglo-Irish Treaty signed in London, leading to the formation of the Irish Free
State and Northern Ireland
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| 8 | 1922 | - 1922: Law of Property Act
- 1 Jun 1922: Royal Ulster Constabulary founded
- Oct 1922: BBC established as a monopoly, and begins transmissions in November (2LO in
London on 14 Nov; 5IT in Birmingham and 2ZY in Manchester on 15 Nov)
- 23 Oct 1922—20 May 1923: Andrew Bonar Law, UK Prime Minister (Conservative)
 Andrew Bonar Law
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