The Great War: Week by Week 100 Years Later S02E17 - Week 39: Gas on the Western Front - Baptism of Fire for Canada

After experiments on the Eastern Front, the German Army is using poison gas for the first time on the Western Front. At the beginning of the 2nd Battle of Ypres, the wind blows in a favourable direction; the wide spread use of chlorine gas has a devastating effect on the French troops. Even the Germans are surprised by it. The incredible sacrifice of the Canadian troops make it possible to defend Hill 60 in the end.