11. Nazi Military Against Political Prisoners and Prisoners of War, 1941-1945: 1.6 Million Casualties
With the use of chemical agents in warfare proliferating, the Nazi military realized that it could use a chemical known as Zyklon B to murder large numbers of people quickly. They would get the prisoners into a room before venting in gas that would kill everyone.
An estimated 1.6 million people died in Nazi gas chambers. This is only a fraction of the total number of deaths caused by the Nazi military. The death toll was six million Jews and an untold number of soldiers and civilians across Europe and Africa.
