At the end of July 1917 Haig launched the 3rd Battle of Ypres (better known as Passchendaele, after a small village on the outskirts of Ypres). The plan was to capture the Passchendaele Ridge and advance to Ostend on the coast. After initial advances by the allies, the opposing sides became bogged down in deep mud which became littered with corpses. The resulting British casualties numbered over 300,000. To many people, including David Lloyd George, the new Prime Minister, Haig was repeating the mistakes of the Somme. Passchendaele remains a symbol of the futility of trench warfare.