 Strategic warfare, and especially strategic bombing, was a supporting component of Allied strategy.Through 1942 and 1943, the Allies gradually won the war at sea and in the air, blockading Germany and subjecting her to a strategic bombing campaign of increasing effectiveness Strategic bombing during World War II.In January 1943, at the Casablanca Conference, the Allies agreed to demand Axis unconditional surrender, a war aim which implied the physical occupation of Germany with land forces.