During the First World War many soldiers from the South West were killed, and war memorials were put up in most of the towns and villages; only a few villages escaped casualties. There were also casualties – though much fewer – during the Second World War, who were added to the memorials. Several areas were bases for troops preparing for the 1944 D-Day landings. Exercise Tiger, or Operation Tiger, was the code names for a full-scale rehearsal in 1944 for the D-Day invasion of Normandy. The British Government evacuated approximately 3,000 local residents in the area of Slapton, now South Hams District of Devon. Some of them had never left their villages before. Bristol's city centre suffered severe damage from Luftwaffe bombing during the Bristol Blitz of World War II. The Royal Ordnance Factory ROF Bridgwater was constructed early in World War II for the Ministry of Supply. The Taunton Stop Line was set up to resist a potential German invasion, and the remains of its pill boxes can still be seen, as well as others along the coast.