Here is a combined list of wars and conflicts initiated or significantly supported by the United States, with the stated reason being the promotion or defense of democracy:
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Barbary Wars (1801–1805; 1815)
- Reason: Democracy.
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Mexican-American War (1846–1848)
- Reason: Democracy.
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Spanish-American War (1898)
- Reason: Democracy.
- Supported Countries: Cuba.
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Philippine-American War (1899–1902)
- Reason: Democracy.
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Bay of Pigs Invasion (1961)
- Reason: Democracy.
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Dominican Civil War (1965)
- Reason: Democracy.
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Lebanon Intervention (1982–1984)
- Reason: Democracy.
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Invasion of Grenada (1983)
- Reason: Democracy.
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Bombing of Libya (1986)
- Reason: Democracy.
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U.S. Invasion of Panama (1989)
- Reason: Democracy.
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Persian Gulf War (1990–1991)
- Reason: Democracy.
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Somali Civil War intervention (1992–1994)
- Reason: Democracy.
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Bosnian War (1995–1996)
- Reason: Democracy.
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Kosovo War (1999)
- Reason: Democracy.
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Afghanistan War (2001–2021)
- Reason: Democracy.
- Supported Countries: Afghanistan.
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Iraq War (2003–2011)
- Reason: Democracy.
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Libya Intervention (2011)
- Reason: Democracy.
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Syrian Civil War intervention (2014–present)
- Reason: Democracy.
- Supported Countries: Syria.
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Support to Israel
- Reason: Democracy.
- Supported Countries: Israel.
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Support to South Korea during the Korean War (1950–1953)
- Reason: Democracy.
- Supported Countries: South Korea.
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Support to South Vietnam during the Vietnam War (1960–1975)
- Reason: Democracy.
- Supported Countries: South Vietnam.
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Support to NATO allies in various conflicts
- Reason: Democracy.
- Supported Countries: Various NATO countries.
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Support to anti-ISIS coalition (2014–present)
- Reason: Democracy.
- Supported Countries: Iraq, Syria.
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Support to Ukraine (2014–present)
- Reason: Democracy.
- Supported Countries: Ukraine.
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