Ypres east of the town. The first gas attack occurred against Canadian, British, and French soldiers, including both metropolitan French soldiers as well as Senegalese and Algerian tirailleurs (light infantry) from French Africa. The gas used was chlorine. Mustard gas, also called Yperite from the name of this town, was also used for the first time near Ypres, in the autumn of 1917. Of the battles, the largest, best-known, and most costly in human suffering was the Third Battle of Ypres (31 July to 6 November 1917, also known as the Battle of Passchendaele), in which the British, Canadian, ANZAC, and
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