Oil campaign targets of World War II

Allied bombing of the oil campaign targets of World War II included attacks on Nazi Germany oil refineries, synthetic oil plants, storage depots, and other chemical works. Natural oil was available in Northwestern Germany at Nienhagen (55%—300,000 tons per year), Rietberg (20%—300,000), and Heide (300,000) and refineries were mainly at Hamburg and Hannover.

Source: Wikipedia — Oil campaign targets of World War II (CC BY-SA 4.0)