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
Structure of the German Army but is supported by the units of the Joint Medical Service as needed. Structure of the German Army The following article lists German active and reserve units within the structure of the German Army . Reserve units do not possess any heavy equipment and their personnel is intended as replacements for losses sustained by regular units. As part of the Franco-German Brigade: As part of the Multinational Corps Northeast: Signals, Psychological Operations, Strategic Reconnaissance (incl. SIGINT), Geographic Information (incl. military satellites), and Electronic Warfare units of the German Armed Forces fall under the Cyber and Information Space Command (Kommando Cyber-