The Battle of Passchendaele was one of the biggest battles of the First World War. It happened between July and November 1917. Allied troops attacked the German Army in many operations. The Allies were commanded by British leaders. The battle was fought for control of a village named Passchendaele. Passchendaele is near the town of Ypres in West Flanders, Belgium. The purpose of the battle was to "wear out the enemy" and "to secure the Belgian coast and connect with the Dutch front lines". The British commander was Douglas Haig. He planned the battle in three parts. These were capturing Passchendaele Ridge, moving to capture Roeselare, and Operation Hush. In Operation Hush, marines were to land somewhere on the Belgian coast and there would be a breakout attack from Nieuwpoort and the Yser bridgehead.