Title: 1840s - Wikipedia
Headings: 1840s
1840s
Contents
Politics and wars
Pacific Islands
East Asia
China
Japan
Southeastern Asia
Siam
Vietnam
New Guinea
Australia and New Zealand
Southern Asia
Afghanistan
India
Sikh Empire
Sri Lanka
Western Asia
Ottoman Empire
Lebanon
Romania
Persian Empire (Iran)
Revolutions of 1848
Eastern Europe
Russia
Austrian Empire
Hungary
Galicia
Northern Europe
Sweden
Denmark
United Kingdom
Royalty
Ireland
Western Europe
Germany
Switzerland
The Netherlands
France
Southern Europe
Greece
Italian Peninsula
Spain
Portugal
Africa
Algeria
Ethiopia
South Africa
Morocco
Liberia
North America
Canada
United States
Slavery
Settlement
Native Americans
Presidents
California
Texas
Mexican–American War
Mexico
El Salvador
Caribbean
Barbados
Dominican Republic
Haiti
Trinidad
South America
Brazil
Uruguay
Paraguay
Argentina
Venezuela
Peru
Chile
Science and technology
Astronomy
Mechanical engineering
Photography
Electricity
Telegraph
Computers
Chemistry
Geology
Physics
Biology
Paleontology
Psychology
Archaeology
Economics
Medicine
Technology
Exploration
Antarctica
Transportation
Rail
Steam power
Other inventions
Commerce
Civil rights
Women's rights
Popular culture
Literature
Theatre
Music
Sports
Fashion
Art
Religion and philosophy
Disasters, natural events, and notable mishaps
Cholera
Establishments
Publications
Institutions
Asia
Australia
Europe
Africa
North America
Other
References
Further reading

Content: In 1848, the publication of the Communist Manifesto by Karl Marx would lay the groundwork for the global socialist movement. The Mexican–American War led to the redrawing of national boundaries in North America. In the United States, mass migration to the new West Coast occurred following the annexation of Caifornia from Mexico, with a Gold Rush beginning at the end of the decade. On its northern border, the United States settled the Oregon boundary dispute with the United Kingdom in 1846, thereby solving a domestic political crisis in the former nation. Contents
1 Politics and wars
1.1 Pacific Islands
1.2 East Asia
1.2.1 China
1.2.2 Japan
1.3 Southeastern Asia
1.3.1 Siam
1.3.2 Vietnam
1.3.3 New Guinea
1.4 Australia and New Zealand
1.5 Southern Asia
1.5.1 Afghanistan
1.5.2 India
1.5.3 Sikh Empire
1.5.4 Sri Lanka
1.6 Western Asia
1.6.1 Ottoman Empire
1.6.1.1 Lebanon
1.6.1.2 Romania
1.6.2 Persian Empire (Iran)
1.7 Revolutions of 1848
1.8 Eastern Europe
1.8.1 Russia
1.8.2 Austrian Empire
1.8.2.1 Hungary
1.8.2.2 Galicia
1.9 Northern Europe
1.9.1 Sweden
1.9.2 Denmark
1.9.3 United Kingdom
1.9.3.1 Royalty
1.9.3.2 Ireland
1.10 Western Europe
1.10.1 Germany
1.10.2 Switzerland
1.10.3 The Netherlands
1.10.4 France
1.11 Southern Europe
1.11.1 Greece
1.11.2 Italian Peninsula
1.11.3 Spain
1.11.4 Portugal
1.12 Africa
1.12.1 Algeria
1.12.2 Ethiopia
1.12.3 South Africa
1.12.4 Morocco
1.12.5 Liberia
1.13 North America
1.13.1 Canada
1.13.2 United States
1.13.2.1 Slavery
1.13.2.2 Settlement
1.13.2.3 Native Americans
1.13.2.4 Presidents
1.13.2.5 California
1.13.3 Texas
1.13.4 Mexican–American War
1.13.5 Mexico
1.13.6 El Salvador
1.14 Caribbean
1.14.1 Barbados
1.14.2 Dominican Republic
1.14.3 Haiti
1.14.4 Trinidad
1.15 South America
1.15.1 Brazil
1.15.2 Uruguay
1.15.3 Paraguay
1.15.4 Argentina
1.15.5 Venezuela
1.15.6 Peru
1.15.7 Chile
2 Science and technology
2.1 Astronomy
2.2 Mechanical engineering
2.3 Photography
2.4 Electricity
2.5 Telegraph
2.6 Computers
2.7 Chemistry
2.8 Geology
2.9 Physics
2.10 Biology
2.10.1 Paleontology
2.11 Psychology
2.12 Archaeology
2.13 Economics
2.14 Medicine
2.15 Technology
2.16 Exploration
2.16.1 Antarctica
2.17 Transportation
2.17.1 Rail
2.17.2 Steam power
2.18 Other inventions
3 Commerce
4 Civil rights
4.1 Women's rights
5 Popular culture
5.1 Literature
5.2 Theatre
5.2.1 Music
5.3 Sports
5.4 Fashion
5.5 Art
6 Religion and philosophy
7 Disasters, natural events, and notable mishaps
7.1 Cholera
8 Establishments
8.1 Publications
8.2 Institutions
8.2.1 Asia
8.2.2 Australia
8.2.3 Europe
8.2.4 Africa
8.2.5 North America
8.3 Other
9 References
10 Further reading
Politics and wars
Pacific Islands
In 1842, Tahiti and Tahuata were declared a French protectorate, to allow Catholic missionaries to work undisturbed. The capital of Papeetē was founded in 1843. In 1845, George Tupou I united Tonga into a kingdom, and reigned as Tuʻi Kanokupolu . East Asia
China
On August 29, 1842, the first of two Opium Wars ended between China and Britain with the Treaty of Nanking. One of the consequences was the cession of modern-day Hong Kong Island to the British. Hong Kong would eventually be returned to China in 1997.