Statista Archive

The Wars With the Highest Annual Death Tolls

In modern history, wars have claimed the lives of hundreds of millions of people. Confined to one conflict, no other death toll was more devastating than that of World War ll. Historians are at odds as to the total number of people that lost their lives, but an upper estimate of 85 million puts it significantly ahead of any other wars or conquests in the period 1492-2005. The Spanish and Portuguese Conquest of the Americas is thought to have led to the death of 55 million people, making it the second most deadly.

When we take into consideration the length of time that the conflicts were fought over though, we get a different picture, revealing the wars with the highest annual death tolls. World War ll had an average 14.17 million deaths per year, compared to 0.51 million for the much longer Iberian Conquest. As our infographic shows, using this measure, World War l moves into second place with its 15 million deaths over 4 years resutling in an annual average of 3.75 million. The 1971 Bangladesh Liberation War led to the deaths of 3 million people, qualifying it for third on this scale.

This infographic is part of Statista's Archive series - showcasing the historical data on our platform.

Description

This chart reveals the major wars/conquests in modern history with the highest average deaths per year.

Download Chart
Number of military and civilian fatalities during the First World War, per country or world power, between 1914 and 1918
Estimated number of military and civilian fatalities due to the Second World War per country or region between 1939 and 1945
Number of military fatalities in all major wars involving the United States from 1775 to January 2025
Military and civilian losses as a share of total fatalities due to the Second World War between 1939 and 1945, by country or region
Total Second World War fatalities as a share of pre-war populations per country or region between 1939 and 1945
Premium statistics
Number of deaths from the deadliest pandemics/epidemics in history worldwide as of 2025 (in millions)

Any more questions?

Get in touch with us quickly and easily.
We are happy to help!

Do you still have questions?

Feel free to contact us anytime using our contact form or visit our FAQ page.

Statista Content & Design

Need infographics, animated videos, presentations, data research or social media charts?

More Information