Battle of Broodseinde

The Battle of Broodseinde was fought on 4 October 1917 near Ypres in Flanders, at the east end of the Gheluvelt plateau, by the British Second and Fifth armies and the German Fourth Army. The battle was the most successful Allied attack of the Battle of Passchendaele. Using "bite-and-hold" tactics, with objectives limited to what could be held against German counter-attacks, the British devastated the German defence, which prompted a crisis among the German commanders and caused a severe loss of morale in the German Fourth Army. Preparations were made by the Germans for local withdrawals and planning began for a greater withdrawal, which would entail the loss to the Germans of the Belgian coast, one of the strategic aims of the British offensive. After the period of unsettled but drier weather in September, heavy rain began again on 4 October and affected the remainder of the campaign, working more to the advantage of the German defenders, who were being pushed back on to far less damaged ground. The British had to move their artillery forward into the area devastated by shellfire and soaked by the return of heavy rain, restricting the routes on which guns and ammunition could be moved, which presented German artillery with easier targets. In the next British attack on 9 October after several days of rain, the German defence achieved a costly defensive success, holding the approaches to Passchendaele village, which was the most tactically vital ground.

• http://en.wikipedia.org/wiki/Battle of Broodseinde