While the use of Chemical Weapons (Gas) was first used in 1915 by Imperial German Forces during The World War I Second Battle of Ypres (Belgium), these formulations were of The Chlorine variety. The use of a Phosgene Formulation was a far more deadly mixture, which effects could kill even 12 hours after exposure. To further enhance Phosgene, German Forces combined both Chlorine and Phosgene Elements. The Gas was deployed via Artillery Rounds fired in concentration barrages. The primary goal of the ''new'' Gas was it's thicker cloud concentration lingered longer in the Trench Position of The British Forces opposing. When Phosgene Gas was first used against British Positions in Flanders (France) 1915, over 200-tons of Chemicals were released. A series of 50-foot Gas Clouds ranging as far as 3-miles (wind effects) from actual deployment areas. The initial attack would yield almost 1,100 British casualties (but only 120 of which were fatalities). However, the long range effects and casualties would increase with the continued usage casualty number from 1915 until 1916 reached 125,141.