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How did RAF and U.S. bombing missions combine to create a round-the-clock air offensive?

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Bombings in World War II: The first war decided from the air — air warfare Overview of aerial bombardment in Europe during World War II, with a detailed discussion of the Battle of Britain.

The Allied round-the-clock air offensive against Germany was achieved by coordinating the distinct operational strengths of the Royal Air Force (RAF) and the U.S. Army Air Forces (USAAF).1

The RAF Bomber Command primarily conducted area bombing raids at night, focusing on industrial centers and cities to destroy war production and undermine civilian morale. Conversely, the U.S. 8th and 15th Air Forces utilized B-17 and B-24 bombers to execute precision daylight attacks against specific industrial targets, such as aircraft factories, ball-bearing plants, and oil refineries.21

This combined effort was formalized by the Casablanca directive in January 1943 and the subsequent "combined bomber offensive plan," also known as Operation Pointblank. By alternating between nocturnal RAF raids and daylight U.S. missions, the Allies maintained constant pressure on German defenses, preventing recovery and eventually achieving total air supremacy. The integration of long-range P-51 fighter escorts allowed U.S. bombers to penetrate deeper into German territory with fewer losses, further enabling this relentless, 24-hour strategic campaign.123