The using of infectious bacteria or viruses as agents of war. 


Bacterias used in the war of decreasing human population and creating infectious agents that can decrease the length of human life.

The Spreading of infections or the weakening of humans or animals using toxins, genetically modified foods, and fungi with the intent to reduce population, kill or incapacitate humans.

Biological warfare (BW)—also known as germ warfare—is the use of biological toxins or infectious agents such as bacteria, viruses, and fungi with intent to kill or incapacitate humans, animals or plants as an act of war. 

Biological weapons (often termed “bio-weapons”, “biological threat agents”, or “bio-agents”) are living organisms or replicating entities (viruses, which are not universally considered “alive”) that reproduce or replicate within their host victims. 

Entomological (insect) warfare is also considered a type of biological weapon.

Rudimentary forms of biological warfare have been practiced since antiquity.
The making of artificial robotic bees, pharmaceutical drugs is also a biological weapon.

During the 6th century BC, the Assyrians poisoned enemy wells with a fungus that would render the enemy delirious. In 1346, the bodies of Mongol warriors of the Golden Horde who had died of plague were thrown over the walls of the besieged Crimean city of Kaffa. 

It has been speculated that this operation may have been responsible for the advent of the Black Death in Europe.

The British army used smallpox in New South Wales in 1789 having attempted to use it as a weapon earlier when they gave contaminated blankets to the Lenape during Pontiac’s War (1763–66).

Article taken from wikipedia