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
History of the German Army Aviation Corps was founded. Even before helicopters had been purchased by the German government, the first officers to become helicopter pilots in the newly formed German Army began their training in August 1956 in the United States at Fort Rucker. In September 1956, the German government purchased the following types of helicopters for the German Army Aviation Corps: Additionally, with the Dornier Do 27 a conventional aircraft was also procured. On 7 November 1956, Colonel Horst Pape became the first head of Department German Army Aviation Corps within the General Staff, after having been responsible since 1954 for the planning and setting