Chemical weapons in World War I volatile oily liquid. It was introduced as a vesicant by Germany in July 1917 prior to the Third Battle of Ypres. The Germans marked their shells yellow for mustard gas and green for chlorine and phosgene; hence they called the new gas "Yellow Cross". It was known to the British as "HS" ("Hun Stuff"), and the French called it "Yperite" (named after Ypres). Mustard gas is not an effective killing agent (though in high enough doses it is fatal) but can be used to harass and disable the enemy and pollute the battlefield. Delivered in artillery shells, mustard gas was
14th Army (German Empire) 14th Army (German Empire) The 14th Army () was an army level command of the German Army in World War I formed in September 1917 in Krainburg for use against Italy. Its Headquarters was located at Vittorio Veneto from 10 November 1917 until the army was disbanded on 22 January 1918. The 14th Army served on the Italian Front throughout its existence. After the Eleventh Battle of the Isonzo, the Austro-Hungarians were exhausted and could not have withstood another attack. They appealed to the Germans for help and the Germans, fearing a collapse on the Italian Front, sent 7 divisions,