Chemical weapons in World War I in Palestine during the Second Battle of Gaza. Russia began manufacturing chlorine gas in 1916, with phosgene being produced later in the year. Most of the manufactured gas was never used. The British Army first used mustard gas in November 1917 at Cambrai, after their armies had captured a stockpile of German mustard gas shells. It took the British more than a year to develop their own mustard gas weapon, with production of the chemicals centred on Avonmouth Docks. (The only option available to the British was the Despretz–Niemann–Guthrie process). This was used first in September 1918 during the breaking
United States Army Gas School greater detail about chemical warfare. Upon its establishment, Ross A. Baker was given charge of training for Chief Gas Officers at the Army Gas School. Baker was the Chief Gas Officer at Camp Pike in Arkansas and a professor of chemistry at the University of Minnesota before taking the post at Camp Humphreys. Later in the month of October 1917 the entire Army Gas School operation was transferred to Camp Kendrick. United States Army Gas School The United States Army Gas School was established during World War I at Camp A.A. Humphreys in Virginia. The first courses began in May