Glenbrook Tunnel War One. The first was Chlorine gas which was introduced by the Germans at the Second battle of Ypres in April 1915. This was followed by the use of Phosphene Gas, also introduced by the Germans. These attacked victims' respiratory organs causing coughing and choking. The Germans used Mustard Gas, a more advanced gas, for the first time at Riga (or Yperite) in September 1917. It caused both internal and external blistering in its victims. The blistering was often delayed and remained in the ground for weeks afterwards making capture of infected trenches dangerous. Protection against mustard gas was far
History of the German 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 in Germany took place on 26 June 1936 with a Focke-Wulf Fw 61. The Focke-Wulf Fw 61 was, however, an experimental helicopter and only two examples were ever built. Yet, Ernst Udet, head of the Reich Air Ministry development wing, having seen the demonstration flights, became a proponent of this relatively new type of aircraft. During World War II, several types were considered to be procured for