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
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