Edgewood Arsenal thumb|right|View of chemical plants, 1918 Although civilian contractors produced the major portion of conventional munitions for World War I, the United States government built federally owned plants on Aberdeen Proving Ground for the manufacture of toxic gas. These poison gas manufacturing facilities came to be known as Edgewood Arsenal. Edgewood Arsenal included plants to manufacture mustard gas, chloropicrin and phosgene, and separate facilities to fill artillery shells with these chemicals. Production began in 1918, reached per month, and totaled of toxic gas manufactured at Edgewood Arsenal before the November 1918 armistice. Some of this gas was shipped overseas for use in French and British artillery shells.
Edgewood Arsenal thumb|right|View of chemical plants 1918 Although civilian contractors produced the major portion of conventional munitions for World War I the United States government built federally owned plants on Aberdeen Proving Ground for the manufacture of toxic gas These poison gas manufacturing facilities came to be known as Edgewood Arsenal Edgewood Arsenal included plants to manufacture mustard gas chloropicrin and phosgene and separate facilities to fill artillery shells with these chemicals Production began in 1918 reached per month and totaled of toxic gas manufactured at Edgewood Arsenal before the November 1918 armistice Some of this gas was shipped overseas for use in French and British artillery shells