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
South Army (German Empire) his place, General der Infanterie Felix Graf von Bothmer of II Bavarian Reserve Corps took command of the South Army. With the Russians withdrawing from the war (Treaty of Brest-Litovsk) and the run down of German forces on the Eastern Front, the army was dissolved on 25 January 1918. The headquarters of the army was located in Mukachevo (from 11 January 1915), Stryi (from 5 June 1915), Berezhany (from 4 September 1915), Khodoriv (from 15 November 1916) and Chortkiv (from 4 August 1917). The South Army had the following commanders during its existence: South Army (German Empire) The South Army