As we all know during World War I machine-guns and chemical warfare caused most of the casualties. More than 100,000 people die because more than 190,000 tons of toxic chemicals were deployed. Now, during World War II, no country resorted to chemical warfare, short tear, or gas. In World War II Germany decided not to use the newly discovered never agents, however, the Germans and Japanese were victims of chemical weapons that was, because the mustard gas was actually used for medical experiments on the prisoners. One thing we do know is that weapons of mass destructions such as, grenades, mines, artillery, and bombs were used in World War II, which was against Hiroshima and Nagasaki. When it comes to mines, during World War II, most of