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
1917 French Army mutinies Passchendaele, with varied success but pertinently relieving pressure on the French to the south. It would not be until early-1918 when the US troops considered themselves ready to accept operational responsibilities, did French morale improve. The Allies withstood the German 1918 Spring Offensive, and held their ground until November, when the 2-3 year British naval blockade of Germany paid dividends. Starved of food, Germany collapsed on the home front. Their leadership was compelled to sue for peace, notwithstanding that hardly an Allied foot had been set on German soil. 1917 French Army mutinies The 1917 French Army mutinies took place