Below is a list of the 18 Deadliest Wars in recorded history.
| War / Conflict | Lowest Death Estimate | Highest Death Estimate | Location |
|---|---|---|---|
| World War II (1939-1945) | 55,000,000 | 72,000,000 | Worldwide |
| An Shi Rebellion (756-763) | 33,000,000 | 36,000,000 | China |
| Mongol Conquests (1207-1472) | 30,000,000 | 100,000,000 | Asia, Central- and Eastern Europe, Middle East |
| Qing dynasty conquest of the Ming Dynasty (1616-1662) | 25,000,000 | 25,000,000 | China |
| Taiping Rebellion (1851-1864) | 20,000,000 | 30,000,000+ | China |
| World War I (High estimate includes Spanish flu deaths) (1914-1405) | 15,000,000 | 65,000,000 | Worldwide |
| Conquests of Timur (1369-1405) | 15,000,000 | 20,000,000 | Middle East, India, Central Asia, Russia |
| Muslim Rebellion (1862-1877) | 8,000,000 | 12,000,000 | China |
| Russian Civil War (1917-1921) | 5,000,000 | 9,000,000 | Russia |
| Second Congo War (1998-2003) | 3,800,000 | 5,400,000 | Democratic Republic of the Congo |
| Napoleonic Wars (1804-1815) | 3,500,000 | 6,500,000 | Europe, Atlantic, Pacific and Indian Ocean |
| Thirty Years' War (1618-1648) | 3,000,000 | 11,500,000 | Holy Roman Empire |
| Yellow Turban Rebellion (184-205) | 3,000,000 | 7,000,000 | China |
| Korean War (1959-1953) | 2,500,000 | 3,500,000 | Korean Peninsula |
| Vietnam War (1959-1975) | 2,495,000 | 5,020,000 | South East Asia |
| French Wars of Religion (1562-1598) | 2,000,000 | 4,000,000 | France |
| Shaka's conquests (1816-1828) | 2,000,000 | 2,000,000 | Africa |
| Afghan Civil War (1979-present) | 1,500,000 | 2,000,000 | Afghanistan |