Stuttgart, like many of Germany's major cities, was ravaged throughout the war by Allied air raids. For the first four years of the war, successful air raids on the city were rare because of the capable defence of the city by Wehrmacht ground forces, the Luftwaffe, and artificial fog. Despite opinions among some Royal Air Force members that day-time air raids on the city were suicidal, substantial damage to the city's industrial capacity still occurred, such as the 25 August bombing of the Daimler AG plant in 1940 that killed five people. With the war increasingly turning against the Third Reich, more and more troops were pulled from the defence of the city in 1943 to fight on the Eastern Front. In 1944, the city centre was entirely in ruins due to British and American bombers that could now more easily attack the city. The heaviest raid took place on 12 September 1944, when the Royal Air Force, dropping over 184,000 bombs – including 75 blockbusters – levelled Stuttgart's city centre, killing 957 people in the resulting firestorm. In totality, Stuttgart was subjected to 53 bombing raids, resulting in the destruction of 57.7% of all buildings in the city, the deaths of 4,477 inhabitants, the disappearance of 85 citizens, and the injury of 8,908 more people. The Allies lost 300 aircraft and seven to ten enlisted men. To commemorate the city citizens who died during the war, the rubble was assembled and used to create the Birkenkopf.