What you're referring to are the lesser known ~~"Hague Conventions of 1899 and 1907"~~ Geneva Protocols https://en.wikipedia.org/wiki/Geneva_Conventions >*Not to be confused with Geneva Protocol (disambiguation) or Convention Relating to the Status of Refugees.* >The Geneva Conventions are four treaties, and three additional protocols, that establish international legal standards for humanitarian treatment in war. The singular term **Geneva Convention usually denotes the agreements of 1949, negotiated in the aftermath of the Second World War (1939–1945), which updated the terms of the two 1929 treaties and added two new conventions.** The Geneva Conventions extensively define the basic rights of wartime prisoners (civilians and military personnel), established protections for the wounded and sick, and provided protections for the civilians in and around a war-zone; moreover, the Geneva Convention also defines the rights and protections afforded to non-combatants. The treaties of 1949 were ratified, in their entirety or with reservations, by 196 countries.[1] **The Geneva Conventions concern only prisoners and non-combatants in war; they do not address the use of weapons of war, which are instead addressed by the Hague Conventions of 1899 and 1907, which concern conventional weapons, and the Geneva Protocol, which concerns biological and chemical warfare.** https://en.wikipedia.org/wiki/Geneva_Protocol *"Geneva Protocols" redirects here. Not to be confused with Geneva Conventions.* The Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous or other Gases, and of Bacteriological Methods of Warfare, usually called the Geneva Protocol, is a treaty prohibiting the use of chemical and biological weapons in international armed conflicts. It was signed at Geneva on 17 June 1925 and entered into force on 8 February 1928. It was registered in League of Nations Treaty Series on 7 September 1929.[4] The Geneva Protocol is a protocol to the Convention for the Supervision of the International Trade in Arms and Ammunition and in Implements of War signed on the same date, and followed the Hague Conventions of 1899 and 1907. It prohibits the use of "asphyxiating, poisonous or other gases, and of all analogous liquids, materials or devices" and "bacteriological methods of warfare". This is now understood to be a general prohibition on chemical weapons and biological weapons, but has nothing to say about production, storage or transfer. Later treaties did cover these aspects – the 1972 Biological Weapons Convention (BWC) and the 1993 Chemical Weapons Convention (CWC). A number of countries submitted reservations when becoming parties to the Geneva Protocol, declaring that they only regarded the non-use obligations as applying to other parties and that these obligations would cease to apply if the prohibited weapons were used against them.[5][6] The main elements of the protocol are now considered by many to be part of customary international law.