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
Battle of Cambrai (1917) to become Cambrai-Fritsch Kaserne. The United States Army occupied Cambrai-Fritsch Kaserne from the end of World War II until 2008, when the land was returned to the German government. Battle of Cambrai (1917) The Battle of Cambrai (Battle of Cambrai, 1917, First Battle of Cambrai and Schlacht von Cambrai) was a British attack followed by the biggest German counter-attack against the British Expeditionary Force (BEF) since 1914, in the First World War. The town of Cambrai, in the département of Nord, was an important supply point for the German (known to the British as the Hindenburg Line) and capture of