On This Day: Germany uses gas attack for 1st time in WWI
April 22 (UPI) -- On April 22, 1915, during World War I, German forces became the first to use poison gas on the Western Front during the Second Battle of Ypres.
April 22 (UPI) -- On April 22, 1915, during World War I, German forces became the first to use poison gas on the Western Front during the Second Battle of Ypres.