British war crimes September 1915 and continued their usage for the remainder of the war. This was done in retaliation for the use of chlorine by Imperial German Army the preceding April. Following the Imperial German Army's use of poison gas at Ypres, the commander of II Corps, Lieutenant General Sir Charles Ferguson, had said of poison gas: Mustard gas was first used effectively in World War I by the German army against British and Canadian soldiers near Ypres, Belgium, in 1917 and later also against the French Second Army. The name "Yperite" comes from its usage by the German army near the
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