20th century Military Conflicts

See also: 19th century Military Conflicts and 21st century Military Conflicts.This article is a list of Military Conflicts that occurred in all countries during the 20th century.
=== Note ===
* * The 1990s war Iraqi No-Fly Zone Enforcement occurred in both the 20th (1991 - 1999) and 21st (2000 - 2003) centuries. 
* A war is placed on where the first year's decade occurred (For example, World War II first occurred in the 1930s, even though it ended in the 1940s). 
== 1900s ==
* Crazy Sneak Rebellion (1909)
== 1910s ==
* Border War (1910 - 1919)
* Negro Rebellion (1912)
* Occupation of Nicaragua (1912 - 1933)
*Bluff War (1914 - 1915)
*Occupation of Veracruz (1914)
*Occupation of Haiti (1915 - 1934)
*Occupation of the Dominican Republic (1916 - 1924)
*World War I (1914 - 1918)
*Russian Civil War (1918 - 1920)
== 1920s ==
* Last Indian Uprising (1923)
== 1930s ==
* World War II (1939 - 1945)
== 1950s ==
* Korean War (1950 - 1953)
* Laotian Civil War (1953 - 1975)
* Lebanon Crisis (1958)
== 1960s ==
* LiBay of Pigs Invasion (1961)
* Vietnam War (1965 - 1973/1975)
* Korean DMZ Conflict (1966 - 1969)
* Dominican Civil War (1965)
* Cambodian Civil War (1967 - 1975)
== 1970s ==
* War in South Zaire (1978)
== 1980s ==
* Operation Eagle Claw (1980)
* Gulf of Sidra encounter (1981)
* Lebanese Civil War (1982 - 1984)
* Invasion of Grenada (1983)
* Action in the Gulf of Sidra (1986)
* Bombing of Libya (1986)
* Tanker War (1987 - 1988)
* Tobruk encounter (1989)
* Invasion of Panama (1989 - 1990)
== 1990s ==
* Gulf War (1990 - 1991)
* Iraqi No-Fly Zone Enforcement (1991 - 2003*)
* Intervention in the Somali Civil War (1992 - 1995)
* Bosnian War (1992 - 1995)
* Intervention in Haiti (1994 - 1995)
* Kosovo War (1998 - 1999)
* Operation Infinite Reach (1998)