A war was an armed conflict between two or more groups or organizations.
Wars by time period
Thousands of years ago
- Great Psionic War (c. 500,000 BC)
19th century
- Napoleonic Wars
- American Civil War (1861-1865)
20th century
- World War I (1914-1918)
- World War II (1939-1945)
- Earth Cold War (1945-1991)
- Korean War (1950-1953)
- Vietnam War (1955-1975)
- Eugenics Wars (1992-1996)
21st century
- Iraq War (2003-2011)
- World War III (2026-2053)
22nd century
- Earth-Kzin Wars
- Earth-Romulan War (2155-2160)
- Romulan-Haakonan War (2156-2157)
- Federation-Tarn War (2160s)
23rd century
- Federation-Klingon Cold War (2218-2293)
- Romulan Civil War (2276)
- Federation-Klingon War (2285)
24th century
- Federation-Cardassian War (2355-2359)
- Tzenkethi War
- Klingon Civil War (2367-2368)
- Klingon-Cardassian War (2372-2373)
- Federation-Klingon War (2372-2373)
- Dominion War (2373-2375)
- Selelvian War (2376)