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 units stationed at these air bases disbanded. Medium Transport Helicopter Regiment 25, based at Laupheim Air Base disbanded on 31 December 2012 and was re-established as Helicopter Wing 64 of the German Air Force on 1 January 2013. At the same time 2nd Squadron of the air force's Air Transport Wing 61, flying helicopters of the type Bell UH-1D, became part of the Germany Army Aviation Corps. History of the German Army Aviation Corps The history of the German Army Aviation Corps goes back to the time when the German Wehrmacht first began to develop helicopters. The first helicopter flight