Gas Protocol of 1925

International treaty signed by most of the world's countries banning the use of chemical and biological weapons. The Gas Protocol was drafted at the 1925 Geneva Conference as part of a series of measures designed to avoid repetition of the atrocities committed by the belligerents in World War I.

Building on several treaties that had ended World War I (notably the 1919 Versailles Treaty between the Allies and Germany), the Gas Protocol specifically prohibited the use in war of asphyxiating, poisonous, or other gases and all kinds of bacteriological agents. The protocol did not ban the development, production, or stockpiling of such weaponry, however. For that reason, the protocol was later supplemented by the 1972 Biological Weapons Convention and the 1993 Chemical Weapons Convention.

Background of the Protocol

The widespread use of asphyxiating gas during World War I ushered in a new era of human-inflicted mass destruction and greatly alarmed the international community. The peace treaties that the victorious Allies signed with defeated Germany, Austria, Bulgaria, and Hungary signaled a strong recognition of the immense danger that chemical and biological weapons represented.

The 1925 Geneva Conference, organized by the League of Nations, the predecessor to the United Nations, took those treaties one step further. At the initiative of the United States, France, and Poland, the participant countries at the conference drafted what came to be known as the Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous or Other Gases, and of Bacteriological Methods of Warfare.

The Gas Protocol was signed and ratified by many countries in the years before World War II. The United States, however, did not officially ratify the protocol until 1975, although it considered itself bound by the ban throughout the war and abided by the signatories' call for the protocol to become “part of International Law, binding alike the conscience and the practice of nations.”

Limitations

Since its inception in 1925, the Gas Protocol has become an important piece of international legislation, and most countries in the world have officially recognized it—including all nations that have a known capability to produce chemical and biological weapons.

The limitations of the protocol, however, became evident soon after the Geneva Conference. At the time of its signing, several great powers (including the United Kingdom, France, and the Soviet Union) explicitly reserved the right to use the forbidden weapons for retaliatory purposes. In other words, should a state decide to use chemical or bacteriological weapons against another country, in full defiance of the stipulations of the protocol, the country under attack would legally be allowed to respond in kind.

The 1925 document also failed to address the production, storage, testing, and transfer of the forbidden weapons, a failure that allowed countries such as the [Page 280]Soviet Union and the United States to amass large supplies of chemical and bacteriological agents. Despite its obvious inadequacies, the protocol remains the legal foundation for a long series of multilateral treaties dealing with the horrific threat that weapons such as mustard gas and anthrax represent.