This article will consider whether the principles of the Geneva Protocol have become so widely accepted that they apply to the United States even though it is not a party. It will analyze the effect of existing reservations to the Protocol, discuss the United States use of tear gases and herbicides in Vietnam in light of its provisions, and recommend that the Protocol be approved by the Senate. This article will first describe the international agreements dealing with poison gas and germ warfare, and the reasons which prevented the United States from becoming a party to them.