War is an armed conflict between the armed forces of states, or between governmental forces and armed groups that are organized under a certain command structure and have the capacity to sustain milit
United States Army soldiers engaged in a firefight with Taliban insurgents during the War in Afghanistan, 2009
The remains of dead Crow Indians killed and scalped by Sioux c. 1874
Les Grandes Misères de la guerre depict the destruction unleashed on civilians during the Thirty Years' War.
Ruins of Warsaw's Napoleon Square in the aftermath of World War II
Biological warfare, also known as germ warfare, is the use of biological toxins or infectious agents such as bacteria, viruses, insects, and fungi with the intent to kill, harm or incapacitate humans,
U.S. Air Force Master Sgt. Jess V. Hernandez, right, assigned to the 119th Maintenance Squadron, leads Airmen through extreme cold, harsh winds and snow on their way to chemical and biological warfare training
Shirō Ishii, commander of Unit 731, which performed human vivisections and other biological experimentation
Researchers working in Class III cabinets at the US Army Biological Warfare Laboratories, Camp Detrick, Maryland (1940s).
US authorities granted Unit 731 officials immunity from prosecution in return for access to their research.