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Imperialism refers to the policy by which powerful nations extended their control over weaker territories and peoples through conquest, colonization, and economic domination. Driven by desires for raw materials, new markets, strategic advantage, and national prestige—as well as ideologies like the 'civilizing mission'—imperialism reshaped the global map between roughly the 15th and 20th centuries. Its legacy includes cultural exchange and technological diffusion, but also exploitation, resistance movements, and the long process of decolonization that continues to influence world politics today. More Less
Oct 12, 1492
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Christopher Columbus's voyage across the Atlantic, sponsored by Spain, led to the European 'discovery' of the Americas. This event initiated centuries of European colonization, conquest, and exploitation of the New World, fundamentally reshaping global history.
Image source: Christopher Columbus
Jun 7, 1494
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Spain and Portugal signed the Treaty of Tordesillas, dividing newly discovered lands outside Europe along a meridian 370 leagues west of the Cape Verde islands. The agreement gave Portugal claim to Brazil and Spain most of the Americas, exemplifying how European powers partitioned the world without regard for indigenous peoples.
Image source: Treaty of Tordesillas
Feb 1519 - Aug 13, 1521
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Hernán Cortés, with Spanish forces and indigenous allies, conquered the Aztec Empire and captured its capital Tenochtitlan. The conquest brought vast territories and wealth under Spanish control and devastated indigenous populations through warfare and disease.
Image source: Fall of Tenochtitlan
1532 - 1572
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Francisco Pizarro led a small Spanish force that toppled the Inca Empire in South America, capturing Emperor Atahualpa in 1532. The conquest opened up immense silver riches, notably at Potosí, and extended Spanish imperial rule across the Andes.
Image source: Spanish conquest of the Inca Empire
May 14, 1607
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English settlers established Jamestown in Virginia, the first permanent English colony in North America. This settlement marked the start of sustained British imperial expansion on the continent, displacing indigenous peoples and laying foundations for future American colonies.
Image source: Jamestown, Virginia
Jul 4, 1776 - Sep 3, 1783
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The thirteen American colonies revolted against British rule, declaring independence in 1776 and securing it by 1783. The revolution demonstrated that imperial subjects could successfully overthrow colonial rule, inspiring later independence movements worldwide.
Image source: American Revolutionary War
1861 - 1871
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The unification of Italy (1861) and Germany (1871) created new nation-states eager to join the race for overseas colonies. Their late entry into imperialism heightened rivalries among European powers and contributed to tensions preceding World War I.
Image source: Unification of Germany
Apr 21, 1898 - Aug 13, 1898
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The United States defeated Spain and acquired Puerto Rico, Guam, and the Philippines, while Cuba came under US influence. The war marked America's arrival as an overseas imperial power and the effective end of the Spanish empire.
Image source: Spanish–American War
Jul 28, 1914 - Nov 11, 1918
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The Great War pitted imperial alliances against each other, destroying the German, Austro-Hungarian, Ottoman, and Russian empires. Allied colonies were redistributed as League of Nations mandates, and wartime sacrifices fueled nationalist movements in Asia and Africa.
Image source: World War I
1501 - 1866
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European powers began forcibly transporting millions of Africans to the Americas to labor on plantations. The Atlantic slave trade was a cornerstone of colonial empires, generating enormous profits while causing immeasurable suffering and demographic devastation in Africa.
Image source: Atlantic slave trade
Jul 1, 1798 - 1801
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Napoleon Bonaparte's invasion of Egypt sought to disrupt British trade routes and establish French influence in the Middle East. Though militarily unsuccessful long-term, the campaign intensified European interest in colonizing Africa and the Ottoman lands.
Image source: French campaign in Egypt and Syria
1881 - 1914
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European powers raced to claim African territory, conquering nearly the entire continent within three decades. Britain, France, Germany, Belgium, Italy, Portugal, and Spain carved out colonies, exploiting resources and imposing colonial administrations.
Image source: Scramble for Africa
Nov 15, 1884 - Feb 26, 1885
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European powers met in Berlin to formalize rules for the Scramble for Africa, dividing the continent among themselves without African representation. The conference accelerated colonization, drawing arbitrary borders whose consequences persist today.
Image source: Berlin Conference
Jul 1, 1885 - Nov 15, 1908
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King Leopold II of Belgium ruled the Congo as his personal possession, exploiting rubber and ivory through brutal forced labor. Millions of Congolese died under his regime before international outrage forced Belgium to annex the territory in 1908.
Image source: Congo Free State
Oct 11, 1899 - May 31, 1902
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Britain fought the Boer republics of Transvaal and Orange Free State, using scorched-earth tactics and concentration camps that caused tens of thousands of civilian deaths. Victory secured British dominance over South Africa and its gold mines.
Image source: Second Boer War
1920
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The League of Nations assigned former Ottoman territories as mandates to Britain and France, including Palestine, Iraq, Syria, and Lebanon. The system perpetuated imperial control under a humanitarian guise and sowed conflicts that endure today.
Image source: Mandate for Palestine
Oct 3, 1935 - May 9, 1936
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Fascist Italy invaded independent Ethiopia, using chemical weapons and overwhelming force to conquer the last major uncolonized African state. The aggression exposed the weakness of the League of Nations and marked a late chapter of African colonization.
Image source: Second Italo-Ethiopian War
Dec 31, 1600
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Queen Elizabeth I granted a royal charter to the English East India Company, beginning British commercial and eventually territorial expansion in Asia. The company became a vehicle of imperialism, ruling large parts of India with its own army before being dissolved in 1874.
Image source: East India Company
Mar 20, 1602
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The Dutch East India Company (VOC) was established to control Dutch trade in Asia. It became the world's first multinational corporation with quasi-governmental powers, establishing colonial outposts in Indonesia and dominating the spice trade for two centuries.
Image source: Dutch East India Company
Jun 23, 1757
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Robert Clive's East India Company forces defeated the Nawab of Bengal at Plassey, marking the beginning of British political dominance in India. The victory allowed the Company to extract enormous wealth and gradually annex the subcontinent.
Image source: Battle of Plassey
Apr 29, 1770
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Captain James Cook charted the eastern coast of Australia and claimed it for Britain, naming it New South Wales. His Pacific voyages paved the way for British colonization of Australia and New Zealand, with devastating consequences for Aboriginal peoples.
Image source: James Cook
Sep 4, 1839 - Aug 29, 1842
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Britain waged war against Qing China to protect its opium trade, winning decisive victories. The Treaty of Nanjing forced China to cede Hong Kong and open treaty ports, inaugurating the era of 'unequal treaties' and foreign domination in China.
Image source: First Opium War
Aug 29, 1842
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Under the Treaty of Nanjing, China ceded Hong Kong Island to Britain in perpetuity. The colony became a key entrepôt of British imperial commerce in East Asia until its handover to China in 1997.
Image source: History of Hong Kong
Jul 8, 1853 - Mar 31, 1854
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US Commodore Matthew Perry's gunboat diplomacy forced Japan to end two centuries of isolation and sign the Treaty of Kanagawa. The episode exposed Japan to Western pressure but also spurred its rapid modernization and eventual rise as an imperial power itself.
Image source: Perry Expedition
May 10, 1857 - Jul 8, 1859
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A widespread uprising against East India Company rule shook British India. Its brutal suppression led to the dissolution of the Company and direct Crown rule, ushering in the period of the British Raj and hardening racial hierarchies of empire.
Image source: Indian Rebellion of 1857
Jan 3, 1868
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Japan's Meiji Restoration restored imperial rule and launched rapid industrialization and military modernization. Determined to avoid Western domination, Japan soon built its own empire, defeating China and Russia and annexing Korea.
Image source: Meiji Restoration
Jul 25, 1894 - Apr 17, 1895
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Japan defeated Qing China, gaining Taiwan and influence over Korea through the Treaty of Shimonoseki. The victory announced Japan's emergence as an imperial power and exposed China's weakness to further foreign encroachment.
Image source: First Sino-Japanese War
Nov 2, 1899 - Sep 7, 1901
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Chinese nationalists known as Boxers attacked foreigners and Christian converts, besieging legations in Beijing. An eight-nation alliance crushed the uprising, imposing heavy indemnities and further entrenching foreign dominance in China.
Image source: Boxer Rebellion
Feb 8, 1904 - Sep 5, 1905
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Japan defeated Russia, becoming the first modern Asian power to beat a European state. The victory gave Japan dominance in Manchuria and Korea, fueling anti-colonial movements across Asia and demonstrating the limits of European power.
Image source: Russo-Japanese War
Aug 29, 1910 - Aug 15, 1945
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Japan formally annexed Korea after years of increasing control, subjecting Koreans to forced assimilation, labor conscription, and cultural suppression. Korean independence came only with Japan's defeat in World War II.
Image source: Korea under Japanese rule
Aug 22, 1791 - Jan 1, 1804
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Enslaved Africans in Saint-Domingue rose against French colonial rule, led by figures like Toussaint Louverture. Haiti became the first Black republic and the first nation born from a successful slave revolt, striking a major blow against slavery and colonialism.
Image source: Haitian Revolution
1810 - 1826
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Inspired by Enlightenment ideals and Napoleon's invasion of Spain, colonies across Latin America rose against Spanish rule. Leaders like Simón Bolívar and José de San Martín won independence for most of South America, dismantling Spain's American empire.
Image source: Spanish American wars of independence
Mar 12, 1930 - Apr 6, 1930
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Mahatma Gandhi led a 240-mile march to the sea to protest Britain's salt monopoly, galvanizing mass civil disobedience across India. The campaign internationalized the Indian independence struggle and weakened the moral legitimacy of the Raj.
Image source: Salt March
Aug 17, 1945 - Dec 27, 1949
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Sukarno declared Indonesian independence as Japan collapsed, triggering four years of armed and diplomatic struggle against returning Dutch colonial forces. International pressure finally forced the Netherlands to recognize Indonesia's sovereignty in 1949.
Image source: Indonesian National Revolution
Aug 15, 1947
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After decades of nationalist struggle led by Gandhi, Nehru, and others, Britain ended its rule of India, partitioning the subcontinent into India and Pakistan. Independence inspired decolonization movements across Asia and Africa, though partition caused massive displacement and violence.
Image source: Indian independence movement
Nov 1, 1954 - Mar 19, 1962
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The FLN launched an armed struggle against French colonial rule in Algeria, one of France's most integrated colonies. After eight years of brutal guerrilla warfare, torture scandals, and urban terrorism, Algeria won independence, hastening the collapse of the French empire.
Image source: Algerian War
Nov 1, 1955 - Apr 30, 1975
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Following French defeat at Dien Bien Phu in 1954, the United States intervened in Vietnam to prevent communist expansion. The costly and divisive war ended with the fall of Saigon in 1975, marking the limits of Western neocolonial intervention in Southeast Asia.
Image source: Vietnam War
1960
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Seventeen African nations gained independence in 1960, including Nigeria, Senegal, and the Democratic Republic of the Congo. The 'Year of Africa' symbolized the accelerating collapse of European colonial empires across the continent.
Image source: 1960 in Africa
1961 - Apr 25, 1974
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Independence movements in Angola, Mozambique, and Guinea-Bissau fought prolonged wars against Portuguese rule. The Carnation Revolution of 1974 overthrew Portugal's dictatorship, leading rapidly to the independence of all its African colonies.
Image source: Portuguese Colonial War
Jul 1, 1997
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Britain returned Hong Kong to China after 156 years of colonial rule, a symbolic end to the territorial empire acquired during the Opium Wars. The handover closed a major chapter of European imperialism in Asia.
Image source: Handover of Hong Kong
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