Chemical weapons and the United Kingdom army against British and Canadian soldiers near Ypres, Belgium, in 1917 and later also against the French Second Army. The name Yprite comes from its usage by the German army near the town of Ypres. The Allies did not use mustard gas until November 1917 at Cambrai, France, after the armies had captured a stockpile of German mustard-gas shells. It took the British more than a year to develop their own mustard gas weapon, with production of the chemicals centred on Avonmouth Docks. (The only option available to the British was the Despretz–Niemann–Guthrie process). This was used first in September
Action of 25 September 1917 reserve to take over the 33rd Division front). Massed small-arms fire repulsed the attack against the 70th Brigade, despite SOS signals to the artillery being obscured by mist and a smaller attempt at was also defeated. Books Theses Action of 25 September 1917 The Action of 25 September 1917 was a German methodical counter-attack ("Gegenangriff") which took place during the Third Battle of Ypres on the Western Front during the First World War. On the front of the British X Corps (Lieutenant-General Thomas Morland) at the south-east side of the Gheluvelt Plateau, two regiments of the German 50th Reserve Division