Sophia Bowman
Updated on March 20, 2026
Likewise, what is the most deadliest war in world history?
World War II
Additionally, which is the most destructive conflict? World War Two
Also question is, what is the deadliest day in history?
September 17
Who killed the most in history?
But both Hitler and Stalin were outdone by Mao Zedong. From 1958 to 1962, his Great Leap Forward policy led to the deaths of up to 45 million people—easily making it the biggest episode of mass murder ever recorded.
On September 1, 1939, Hitler invaded Poland from the west; two days later, France and Britain declared war on Germany, beginning World War II. On September 17, Soviet troops invaded Poland from the east.
| Event | Lowest estimate | From |
|---|---|---|
| World War II | 60,000,000 | 1939 |
| Three Kingdoms | 36,000,000 | 184 |
| Mongol conquests | 30,000,000 | 1206 |
| European colonization of the Americas | 8,400,000 | 1492 |
| War (and years of U.S. military involvement) | Number of fatalities |
|---|---|
| American Revolutionary War (1775-1783) | 25,000 |
| War of 1812 (1812-1815) | 20,000 |
| Mexican-American War (1846-1848) | 13,283 |
| War on Terror** (2001-present) | 7,053 |
