Battle of Polygon Wood

The Battle of Polygon Wood took place during the second phase of the Third battle of Ypres in World War I and was fought near Ypres in Belgium 26 September – 3 October 1917, in the area from the Menin Road to Polygon Wood and thence north, to the area beyond St. Julien. Much of the woodland had been destroyed by the huge quantity of shellfire from both sides since 16 July and the area had changed hands several times. General Herbert Plumer continued the series of British general attacks with limited objectives. The British attacks were led by lines of skirmishers, followed by small infantry columns organised in depth, (a formation which had been adopted by the Fifth Army in August) with a vastly increased amount of artillery support, the infantry advancing behind five layers of creeping bombardment on the Second Army front.

The advance was planned to cover 1,000–1,500 yards (910–1,400 m) and stop on reverse slopes, which were easy to defend, enclosing ground which gave observation of German reinforcement routes and counter-attack assembly areas. Preparations were then made swiftly to defeat German counter-attacks, by mopping-up and consolidating the captured ground with defences in depth. The attack inflicted a severe blow on the German Fourth Army, causing many losses, capturing a significant portion of Flandern I, which threatened the German hold on Broodseinde ridge. The better weather continued to benefit the British attackers by drying the ground, raising mist which obscured British infantry attacks made around dawn, then clearing to reveal German Eingreif formations to air and ground observation, well in advance of their arrival on the battlefield. German defensive arrangements were changed hastily after the battle, to try to counter British offensive superiority.