What did the Geneva Protocol of 1925 ban during international conflicts?

The Geneva Protocol of 1925, formally known as the Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous or Other Gases, and of Bacteriological Methods of Warfare, specifically banned the use of chemical weapons and biological weapons in international conflicts.21

Specifically, the treaty prohibited the use of:
* Asphyxiating, poisonous, or other gases.21
* Bacteriological methods of warfare.21

It is important to note that the protocol was limited in scope. It did not prohibit the development, production, or stockpiling of these weapons, and many nations explicitly reserved the right to use them in retaliatory strikes. Furthermore, the agreement applied only to international conflicts and did not extend to internal or civil wars. Because of these limitations, the protocol was later supplemented by more comprehensive treaties, such as the Biological Weapons Convention of 1972 and the Chemical Weapons Convention of 1993.21