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| 20th-century coups d'état | |
|---|---|
| Name | 20th-century coups d'état |
| Date | 1900–1999 |
| Location | Worldwide |
| Outcome | Regime changes, countercoups, foreign interventions |
20th-century coups d'état were abrupt seizures of power that reshaped the trajectories of nations across Africa, Asia, Europe, the Americas, and Oceania, producing durable effects on states such as Ottoman Empire, Weimar Republic, Russian Soviet Federative Socialist Republic, Republic of China (1912–1949), Kingdom of Egypt. They linked figures from Mustafa Kemal Atatürk to Fidel Castro, connected institutions like the British Empire and the United States Department of State to clandestine organizations such as the Central Intelligence Agency and the KGB, and intersected with conflicts including the First World War, Second World War, and Cold War.
Scholars distinguish coups involving armed cadres, exemplified by the 1917 October Revolution, from palace revolts like the 1936 Spanish coup d'état and conspiracies such as the 1953 Iranian coup d'état; analysts cite events in Greece, Chile, Pakistan, Guatemala, and Nigeria to delimit typologies. Debates among authors referencing Samuel P. Huntington and institutions such as the United Nations and International Committee of the Red Cross emphasize criteria drawn from the Constitution of France and comparative studies of the Ottoman Coup of 1909 and the 1944 Bolivian revolution. Legal scholars compare coups against concepts embodied in the Treaty of Versailles, the United Nations Charter, and doctrinal rulings from courts like the International Court of Justice.
Analyses attribute waves of coups to crises rooted in colonial collapse in India, French Indochina, and Algeria; to Cold War rivalry between the United States and the Soviet Union manifested in interventions in Congo Crisis, Bay of Pigs Invasion, and Operation Ajax; and to structural weaknesses seen in the Ottoman Empire and the Qing dynasty. Economic shocks following the Great Depression, commodity collapses affecting Argentina and Nigeria, and nationalist mobilizations linked to movements such as Indian independence movement and African nationalism created permissive environments. Party breakdowns within organizations like the Communist Party of the Soviet Union and factionalism in militaries exemplified in Thailand and Turkey correlate with coup incidence.
Africa features coups from Ghana under Kwame Nkrumah to Libya under Muammar Gaddafi and countercoups in Sierra Leone and Sudan. Asia includes the 1947 Partition of India aftermath, the 1949 Chinese Communist Revolution, the 1947–1949 Indonesian National Revolution, the 1962 Burmese coup d'état, and the 1979 Iranian Revolution followed by the 1979–1981 Iranian hostage crisis. Europe saw coups and putsch attempts including the 1917 Russian Revolution, the 1922 March on Rome, the 1934 Austrian Civil War and the 1936 Greek coup d'état. The Americas host seminal cases like the 1954 Guatemalan coup d'état, the 1973 Chilean coup d'état, the 1961 Cuban Revolution, and multiple interventions in Central America and Argentina. Oceania experienced fewer events but notable instability linked to decolonization in Papua New Guinea and Pacific island politics.
Primary actors included military officers such as Augusto Pinochet, Juan Velasco Alvarado, Sani Abacha, and Hugo Banzer; civilian leaders and conspirators like Mohammad Mosaddegh, Jacobo Árbenz, and Getúlio Vargas; and revolutionary commanders such as Ho Chi Minh and José Carlos Mariátegui. Intelligence services including the Central Intelligence Agency, MI6, and the KGB played facilitating roles alongside transnational corporations and financial actors like the United Fruit Company and international lenders represented by the International Monetary Fund. Political parties such as the Ba'ath Party, Congress Party (India), and Peronist Party were frequently implicated in coup dynamics.
Tactics ranged from swift armored thrusts as in Night of the Long Knives-era maneuvers, to airborne operations during the Bay of Pigs Invasion, to clandestine propaganda campaigns using outlets like Radio Free Europe and All India Radio. Communications technologies including the telegraph, radio broadcasting, and later television broadcasting and encrypted SIGINT assets shaped mobilization. Logistics relied on arsenals featuring tanks such as the T-34, aircraft models like the Douglas C-47 Skytrain, and maritime sealift exemplified by operations during the Suez Crisis and the Anglo-Egyptian War.
Outcomes included short-term regime replacement as in Greece (1967–1974) and protracted authoritarian rule exemplified by Chile (1973–1990), Myanmar (Burma), and Indonesia under Suharto. Coups produced human rights crises catalogued by Amnesty International and the Human Rights Watch, economic realignments influenced by policies of Milton Friedman and Structural Adjustment frameworks advocated by the International Monetary Fund, and geopolitical realignments contributing to conflicts such as the Vietnam War and Angolan Civil War. Institutional legacies altered constitutions like those of Egypt and Pakistan and reshaped political cultures in states such as Turkey and Argentina.
Responses included diplomatic sanctions by the United Nations Security Council, covert operations by the Central Intelligence Agency and MI6, peacekeeping efforts coordinated by the United Nations and the Organization of American States, and legal adjudication in bodies like the International Court of Justice. Doctrines such as the Monroe Doctrine and policies exemplified by the Truman Doctrine and Brezhnev Doctrine influenced interventions. Over the century, norms evolved toward condemnation of coups in instruments endorsed by forums like the United Nations General Assembly and regional bodies such as the African Union and the Organization of American States.
Category:20th century