These air battleships deployed poison gas bombs. He returns home permanently injured by a poison gas attack. In addition to being granted permission to use poison gas, Badoglio received additional ground forces. See Use of poison gas in World War I. The bombardment was followed by a poison gas drop. Chloropicrin was manufactured for use as poison gas in World War I. Many of them died underground, including those who died of numerous alleged poison gas attacks. His sidekick is Papageno, a man who uses underground pigeons to check for poison gas. Again several villages were attacked with poison gas. Also unearthed is a plot to attack Israel with newly manufactured Zyklon B poison gas. This remains the deadliest use of poison gas in history. The Treaty further prohibited the manufacture, import and export of weapons and poison gas. They were also used by officers to finish enemy soldiers wounded by poison gas attacks. However, Yueh has given the captured Leto a false tooth filled with poison gas. On 22 April, the Germans sought to eliminate this salient by using poison gas.