LONDON NUCLEAR WARFARE TRIBUNAL
Evidence, Commentary, and Judgment

The law relating to poison was formally pronounced in the 1925 Geneva Protocol for the Prohibition of the Use in War of Asphyxiating, poisonous or Other Gases, and of Bacteriological Methods of Warfare which prohibited the use in war of asphyxiating, poisonous or other gases, and all analogous liquids, materials or devices including bacteriological warfare.

Between 1925 and World War II there were no major developments in the laws of war, apart from the proposed Treaty of Paris mentioned earlier.