Because of a singular devotion to victory through strategic bombing, the USAAF placed extraordinary emphasis on reconnaissance. As an example, the need to destroy German petroleum, oil and lubricants facilities required careful monitoring to decide not only what to hit, but when and how much – and then when to hit them again. This led to an emphasis on long-term surveillance, and also to centralized analysis correlating photography with other sources (such as agents on the ground). Although the RAF usually preferred area bombing, it promoted a similar reconnaissance emphasis, for example in the celebrated discovery, coverage, and analysis of the Peenemunde rocket range which culminated in the Operation Hydra raid in august 1943. The Axis had no comparable strategic capability and most Axis air resources were consumed in support of massive ground battles.