Top 5 Deadliest Wars in Human History

1. World War II (1939-1945):
   - Total Deaths: Estimates vary widely, but generally accepted to be between 70 million to 85 million people.
   - Countries Involved: Virtually all continents and major powers were involved.

2. Second Sino-Japanese War (1937-1945):
   - Total Deaths: Estimates vary widely, but often cited around 20 million people (including military and civilian casualties).
   - Location: Mainland China.
   Cause: Conflict between China and Japan over territorial and political disputes.

3. Taiping Rebellion (1850-1864):
   - Total Deaths: Estimates range from 20 million to 30 million people.
   - Location: China.
   Cause: A massive civil war against the ruling Qing Dynasty, led by the Taiping Heavenly Kingdom.

4. World War I (1914-1918):
   - Total Deaths: Approximately 16 million people (including military and civilian casualties).
   - Countries Involved: Many European powers, along with involvement from other continents due to colonial ties.

5. Russian Civil War (1917-1922):
   - Total Deaths: Estimates range from 7 million to 12 million people.
   - Location: Russia.
   Cause: Fought between the Bolshevik (Red) Army and the anti-Bolshevik (White) forces, along with other factions.

These wars represent some of the deadliest conflicts in history, with staggering numbers of casualties and profound impacts on the societies and nations involved.