If you are going to divert this into something else you may as well say World War One which was basically a conflict to decide who should rule the planet, as the greatest example

Alfonso Bullock, studies Warfare & Warfare at Military Technology (2024)
Answered Jun 6, 2018
World War One was one of the deadliest conflicts in the history of the human race, in which over 16 million people died. The total number of both civilian and military casualties is estimated at around 37 million people. The war killed almost 7 million civilians and 10 million military personnel.

"Leopold II of Belgium (Congo, 1886-1908) 8,000,000 "
Why downgrade one of the main perpetrators - the lowest estimate is 10 million, but due to the lack of real information, and the nature of the terrain and cultures, it is calculated as high as 20 million
Jim Carroll