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14th Army (German Empire) front came under the command of 51st Corps until it was withdrawn in February 1918. Units are German unless designated as Austria-Hungary. The 14th Army was commanded throughout its existence by General der Infanterie Otto von Below, former commander of 6th Army. On dissolution of 14th Army, von Below was transferred to command of the newly raised 17th Army on the Western Front. 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