Highest death toll from a civil war

According to Official Guinness Records,

The world's costliest civil war, in terms of the number of lives lost during combat and in events relating to the war, is the Russian Civil War of 1917-22. It is estimated that the former Soviet Union lost some 1.5 million combatants, and around 8 million civilians died following armed attacks, famine and disease.

For a complete list of Unknown date records, please visit Unknown date Guinness Records in Russia.

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