It will be forever known as Passchendaele: the very word is used to describe wretched & perilous conditions such as were encountered at the battles which became officially designated as Third Ypres. There with better tactics, equipment & experience than he had previously employed, Haig was surely set for considerable advance & ultimate success. Initial successes were, however, reversed by stout German defence & weak British strategy before unprecedented rainfall reduced the Belgian landscape to a quagmire. Through August the British suffered net losses & only towards the end of September did the more enlightened command of Plumer bring gains against the German divisions, only for more rain & the subsequent reduction of offensive effectiveness to reduce territorial gains to a meaningless trickle. Following his popular volume on The Somme, Chris Mc Carthy re-assesses & enhances the official history of Third Ypres, presenting his research with comprehenive illustrations & valuable coloured maps.