After the first German employment of gas warfare for the duration of World War I at Ypres in Belgium on 22 April 1915, technological and physiological research into gas warfare was conducted in Britain by outstanding scientists called Fritz Haber, responsible for developing poisonous gases for Germany during the First World War, was also responsible for developing the crucial process for extracting nitrates from the atmosphere. In the United States, in the fall of 1915, the War Department began to show interest in providing troops with gas protection and assigned responsibility for the design and development of respirators to the Medical Department, which led to the rapid development of protection and subsequent development of offensive equipment; this accumulation of valuable experience was then made available to the United States. The Chemical Section was created to satisfy General Pershing's request repeated 5 times between September 26 and December 9, 1918, General Pershing requested a Chemical Laboratory, complete with equipment and personnel responsible for examining gases and dusts, general order number 62 of the War Department, dated June 28, 1918, provided for the implementation of an executive order for the establishment of this separate technical service with full responsibility for carrying out investigations, research, development and production of protective equipment and for supplying to the U.S. arsenals a family of toxic agents capable of effective use in war. The 30th Engineer Gas and Flame Company became the first chemical warfare service combat unit to be redesignated into the AEF (France). When the 30th Engineers, Gas and Flame, transferred to the Chemical Warfare Service, it was redesigned as... mid-paper... and mid-'80s. Between 1979 and 1989 the Army established 28 active duty chemical defense companies. Works Cited Kim Coleman, Kim Collection, Palgrave McMillan, (2005) A History of Chemical Warfare The First World War, 2(1) 11-23 Brophy And Fisher, US Army in World War II (1989) The Chemical Warfare Service: Organization for war, The years between the wars, The chemical warfare service, National Army. II (1) 18-43, 393-400 Frank C. Conahan, Report to Congressional Applicants, (1991) Chemical Warfare, Soldiers Inadequately Equipped and Trained to Conduct Chemical Operations, Steven L. Hoenic Handbook of Chemical Warfare and Terrorism (2002) Introduction : A Brief History of Chemical Agents 1 (1) 3-22Main Story Instruction Segment (2006) CML DVD 143National Museum United States Army Website https://armyhistory.org/09/the-us-army-chemical -corps/