The armed conflicts with the highest estimated death tolls. This comprehensive dataset is meticulously compiled from verified global sources and updated regularly. Use the sorting and filtering tools to explore the data, or export it as CSV for deeper analysis. All figures are cross-referenced with authoritative international databases.
| Rank ⇵ | War ⇵ | Estimated Deaths ⇵ | Time Period ⇵ |
|---|---|---|---|
| 1 | World War II | 1939–1945 | 70–85 Million |
| 2 | Mongol Conquests | 1206–1368 | 30–40 Million |
| 3 | World War I | 1914–1918 | 15–40 Million |
| 4 | Taiping Rebellion | 1850–1864 | 20–30 Million |
| 5 | Second Sino-Japanese War | 1937–1945 | 20–25 Million |
| 6 | Qing Conquest of Ming | 1618–1683 | 25 Million |
| 7 | An Lushan Rebellion | 755–763 | 13–36 Million |
| 8 | Dungan Revolt | 1862–1877 | 8–12 Million |
| 9 | Russian Civil War | 1917–1922 | 5–9 Million |
| 10 | Thirty Years' War | 1618–1648 | 4–8 Million |
| 11 | Chinese Civil War | 1927–1949 | 8 Million |
| 12 | Napoleonic Wars | 1803–1815 | 3.5–7 Million |
| 13 | Conquests of Timur | 1370–1405 | 8–17 Million |
| 14 | French Wars of Religion | 1562–1598 | 2–4 Million |
| 15 | Second Congo War | 1998–2003 | 2.5–5.4 Million |
| 16 | Korean War | 1950–1953 | 1.2–3 Million |
| 17 | Vietnam War | 1955–1975 | 1.3–4.3 Million |
| 18 | Mexican Revolution | 1910–1920 | 1–2 Million |
| 19 | Biafran War (Nigerian Civil War) | 1967–1970 | 1–3 Million |
| 20 | Soviet-Afghan War | 1979–1989 | 500k–2 Million |
| 21 | Iran-Iraq War | 1980–1988 | 1–2 Million |
| 22 | US Civil War | 1861–1865 | 620,000–1 Million |
| 23 | Rwandan Civil War & Genocide | 1990–1994 | 800,000+ |
| 24 | Spanish Civil War | 1936–1939 | 500,000–1 Million |
| 25 | Gallic Wars | 58 BC–50 BC | 1 Million |
| 26 | Algerian War | 1954–1962 | 400,000–1.5 Million |
| 27 | Mughal-Maratha Wars | 1680–1707 | 1–2 Million |
| 28 | Yugoslav Wars | 1991–2001 | 130,000–140,000 |
| 29 | Syrian Civil War | 2011–Present | 500,000–600,000 |
| 30 | Congo Crisis | 1960–1965 | 100,000 |
| 31 | War of the Triple Alliance | 1864–1870 | 400,000 |
| 32 | Balkan Wars | 1912–1913 | 140,000 |
| 33 | First Indochina War | 1946–1954 | 400,000 |
| 34 | Goguryeo-Sui War | 598–614 | 2 Million |
| 35 | Colombian Conflict | 1964–Present | 450,000 |
| 36 | Second Boer War | 1899–1902 | 75,000 |
| 37 | War in Afghanistan | 2001–2021 | 176,000 |
| 38 | Iraq War | 2003–2011 | 200k–1 Million |
| 39 | Yemeni Civil War | 2014–Present | 377,000 |
| 40 | Chechen Wars | 1994–2009 | 100,000–300,000 |