Answer:
This list of genocides by death toll includes estimates of all deaths which were directly or indirectly caused by genocide, as it is defined by the UN Convention. It excludes other mass killings, which are variously called mass murder, crimes against humanity, politicide, classicide, or war crimes, such as: the Thirty Years War (7.5 million deaths), Japanese war crimes (3 to 14 million deaths), the Red Terror (100,000 to 1.3 million deaths), the Atrocities in the Congo Free State (1 to 15 million deaths), the Great Purge (0.6 to 1.75 million deaths) or the Great Leap Forward and the famine which followed it (15 to 55 million deaths).
Explanation:
Here's by death.