During the Oil Campaign of World War II, the Allies conducted bombing of Ludwigshafen and Oppau. Thirteen thousand Allied bombers hit the city in 121 separate raids during the war, of which 56 succeeded in hitting the IG Farben plant. Those 56 raids dropped 53,000 bombs each containing 250 to 4,000 pounds of high explosives, plus 2.5 million 4-pound magnesium incendiary bombs (the bombers also dropped millions of leaflets warning the civilians to evacuate the city, plus counterfeit ration coupons). Repairs took longer and longer as spare parts became more difficult to find. By December 1944, so much damage had been done to vital utilities that output dropped to nearly zero. Follow-up raids every week ended production permanently. By war's end most dwellings were destroyed or damaged; 1,800 people had died, and 3,000 were injured.