Japan during World War II August to October 1938. By the time World War Two was in full swing Japan had the most interest in using biological warfare. Japan's Air Force dropped massive amounts of ceramic bombs filled with bubonic plague infested fleas in Ningbo, China. These attacks would eventually lead to thousands of deaths years after the war would end. In Japan's relentless and indiscriminate research methods on biological warfare, they poisoned more than 1,000 Chinese village wells to study cholera and typhus outbreaks.These diseases are caused by bacteria that with today's technology could potentially weaponised. Japan during World War II The Empire of
Declarations of war during World War I 1907 (or Hague II). For the diplomatic maneuvering behind these events, which led to hostilities between nations during World War I, see the article entitled Diplomatic history of World War I. Below is a table showing the "Outbreaks of Wars between Nations" which occurred during World War I. Indicated are the dates (during the immediate build-up to, or during the course of, World War I), from which a "de facto" state of war existed between nations. The table shows both the "Initiator Nation(s)" and the nation at which the aggression was aimed, or "Targeted Nation(s)". Events listed include those in