From 21 to 23 April , British artillery-fire exploded Destroying several gas cylinders in the German lines around Spanbroekmolen , which released greenish-yellow clouds .

After a hurricane bombardment Attack , the objectives were captured Conquering with few British losses Earnings_and_losses and German counter-attacks Attack were defeated Conquering by artillery-fire .

To exploit Hold the success , British cavalry went Self_motion forward to probe the area around the village but were repulsed Defending by machine-gun Use_firearm and artillery-fire Bearing_arms from improvised German defences Defending on Transloy Ridge .

After a dry spell in September , rains began Process_start on 3 October and by the Battle Hostile_encounter of Poelcappelle on 9 October much of the British field artillery opposite Passchendaele was out of action due to the effects Influence of rain , mud and German artillery-fire .