During the Battle of Normandy in the Second World War, Caen was taken back from the Nazis in early July, a month after the Normandy landings, particularly those by British I Corps on 6 June 1944. British and Canadian troops had intended to capture the town on D-Day. However they were held up north of the city until 9 July, when an intense bombing campaign during Operation Charnwood destroyed 70% of the city and killed 2,000 French civilians. The Allies seized the western quarters, a month later than Field Marshal Montgomery's original plan. During the battle, many of the town's inhabitants sought refuge in the Abbaye aux Hommes ("Men's Abbey"), built by William the Conqueror some 800 years before. The spire of the Church of Saint-Pierre, Caen and the university were destroyed by the British and Canadian bombing.