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Date |
Event(s) |
| 1 | 1845 | - 4 Mar 1845—3 Mar 1849: James Knox Polk, 11th President of the United States
 jJames K. Polk
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| 2 | 1846 | |
| 3 | 1849 | - 1849: Florin (2 shilling coin) introduced as the first step to decimalisation
- 1849: Netherlands
King William II dies of a heart attack . On May 12 , King William III inaugurated
- 4 Mar 1849—9 Jul 1850: Zachary Taylor, 12th President of the United States
 Zachary Taylor
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| 4 | 1850 | - 9 Jul 1850—3 Mar 1853: Millard Fillmore, 13th President of the United States
 Millard Fillmore
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| 5 | 1851 | - 1851: Gold discovered in Australia
- 1851: Australia Gold Rush
Gold is discovered at Summerhill Creek and Ballarat
- 1 May 1851: Great exhibition of the works of industry of all nations ("Crystal Palace" exhibition) opened in Hyde Park
- 1 Jul 1851: Australia Victoria
Victoria colony is founded
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| 6 | 1852 | |
| 7 | 1853 | - 1853: Vaccination against smallpox made compulsory in Britain
- 4 Mar 1853—3 Mar 1857: Franklin Pierce, 14th President of the United States
 Franklin Pierce
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| 8 | 1854 | - 1854: Cigarettes introduced into Britain
- 27 Mar 1854: Britain declares war on Russia (Crimean War)
- 25 Oct 1854: Battle of Balaklava in Crimea (charge of the Light Brigade)
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| 9 | 1855 | - 1855: Australia Chinese
Chinese Immigration Act
- 1855: Australia Vote
Men over the age of 21 in South Australia gain the right to vote
- 6 Feb 1855—19 Feb 1858: Henry John Temple, 3rd Viscount Palmerston, UK Prime Minister (Tory and Whig)
 Henry John Temple, 3rd Viscount Palmerston
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| 10 | 1856 | - 1856: End of Crimean War
- 29 Jan 1856: Victoria Cross created by Royal Warrant, backdated to 1854 to recognise acts
during the Crimean War (first award ceremony 26 June 1857)
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