Combined Bomber Offensive

• 1. Origins And Directives

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  The Combined Bomber Offensive began its planning phase in December 1942 when the US Committee of Operations Analysts started work. This group submitted a report to General Hap Arnold on the 8th of March 1943 that identified six vulnerable target systems including German submarine yards and oil production. The British Ministry of Economic Warfare had published the Bombers' Baedeker in 1942 which highlighted bottleneck industries like ball bearings and communications networks. At the Casablanca Conference held in January 1943, Allied leaders agreed to conduct a bomber offensive from the United Kingdom. Air Minister Arthur Harris issued the Casablanca directive on February 4 with specific objectives for the campaign. Lieutenant General Ira C. Eaker led an Anglo-American committee that completed a plan by April 1943 projecting US bomber strength through March 1944. The plan called for 944 bombers in the first phase increasing to 2,702 by the final phase. On the 19th of May 1943 the Combined Chiefs of Staff approved what became known as the Eaker Plan. This document identified intermediate objectives focused on German fighter strength alongside primary targets like aircraft factories and ball bearing plants.

• 2. Operational Tactics And Execution

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  British bombing campaigns operated primarily at night using heavy bombers while American forces conducted daylight raids with escorting fighters. The Pointblank directive issued on the 14th of June 1943 ordered both RAF Bomber Command and the U.S. Eighth Air Force to attack specific targets including aircraft factories. British operations continued as broad night attacks on industrial areas even after the directive was issued. American missions involved massed formations of bombers protected by squadrons of Republic P-47 Thunderbolts and North American P-51 Mustangs. July 1943 marked the first coordinated raid where USAAF flew two daylight missions against Hamburg following an opening RAF campaign. Fires from the night bombing obscured targets causing American crews to avoid following immediately behind British raids due to smoke problems. The Luftwaffe built large-scale decoy sites like the Krupp decoy site near Essen to divert Allied airstrikes from actual production facilities. These deception efforts included creating fake steel works complexes designed to absorb bombing strikes away from real arms factories. By October 1943 losses reached about a quarter of aircraft during what became known as Black Thursday forcing the USAAF to discontinue deep strikes until better escorts were available.

• 3. The Battle For Air Superiority

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  Operation Argument launched between February 20 and 25, 1944 became known as Big Week when the USAAF attacked German aircraft industry with massive bomber formations. Major General Jimmy Doolittle changed policy allowing escort fighters to fly ahead of bomber formations to clear skies of Luftwaffe opposition. This freedom for fighters inflicted heavy losses on twin-engined Zerstörergeschwader destroyer wings and heavily armored Focke Wulf Fw 190 Sturmgruppen units. After bombers hit their targets American fighters could strafe German airfields and transport infrastructure while returning to base. The Luftwaffe was forced into defending against these raids drawing fighters into battle with bombers and their escorts. Despite heavy losses during early operations the campaign achieved air superiority over Europe by spring 1944. By the Normandy Landings only 80 operational Luftwaffe aircraft remained on the North French Coast managing about 250 combat sorties against 13,743 Allied sorties that day. The last two Jagdgeschwader 26 Fw 190As piloted by Josef Priller and Heinz Wodarczyk conducted sparse day sorties over Normandy beaches before June 7 when the Luftwaffe began redeploying approximately 600 aircraft to France.

• 4. Strategic Targeting Shifts

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  The Combined Bomber Offensive shifted priorities from fighter factories to petroleum plants and transportation networks throughout 1944. Initial Pointblank operations focused on destroying German aircraft industry but production actually increased significantly despite bombing efforts. Single-engine fighter production reached its wartime peak in September 1944 at 3,031 aircraft per month totaling 25,860 ME-109s and FW-190s for the entire year. After Operation Pointblank Germany dispersed aircraft industry works across 729 medium and very small plants including facilities inside tunnels caves and mines. In June 1944 highest priority became operations against V-weapon installations while September brought focus to oil campaigns targeting POL plants. Air Marshal Trafford Leigh-Mallory drafted plans for Overlord that initially omitted air superiority requirements focusing instead on rail yards and repair facilities. Eisenhower permitted Spaatz to test whether Luftwaffe would defend oil targets more heavily through trial raids on May 12 and May 28. These tests showed German fighters heavily defended oil targets leading to their recall from French bases to protect Reich industry during good weather of May.

• 5. Impact On German Industry

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  Operation Pointblank demonstrated that German aircraft and ball bearing plants were not very vulnerable to air attack despite heavy losses inflicted. Production of synthetic rubber ammunition nitrogen and ethyl fluid concentrated in fewer factories remained much more vulnerable than fighter manufacturing. Despite bombing German single-engine fighter production for the first quarter of 1944 was 30% higher than third quarter 1943 base figures. By second quarter 1944 production doubled and by third quarter it had tripled reaching a monthly peak of 3,031 aircraft in September 1944. Total German single-engine fighter production for 1944 reached 25,860 ME-109s and FW-190s according to William R. Emerson. The campaign did help diminish the Luftwaffe threat against Allies though by Normandy Landings only 80 operational aircraft remained on North French Coast. British historians identified the Battle of Berlin as an operational defeat due to unsustainable losses of 7, 12% of aircraft committed to large raids. Between the 18th of November 1943 and the 31st of March 1944 RAF Bomber Command destroyed around 4,500 acres of Berlin losing 300 aircraft while suffering further damage to 1,682 others.

• 6. Role In The Normandy Invasion

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  Control of all air operations transferred to Eisenhower at noon on April 14 when he decided transportation plans offered reasonable chances for air forces contributing to land battles. Churchill wrote to Roosevelt in May 1944 expressing doubt about wisdom of rail yard attacks after few German fighters rose to contest early strikes. The Ninth Tactical Air Force dropped 33,000 tons of bombs through April on French railway targets before invasion began. On June 7 and 8 the Luftwaffe began redeploying approximately 600 aircraft to France for attacking the Normandy bridgehead despite sparse day sorties over beaches. Pointblank operations ended on fifth day of invasion shifting highest priority to rocket weapons in June 1944 then oil campaigns in September. Tedder's proposal keeping oil targets as highest priority received approval from CSTC on November 1. Strategic Bombing Directive No. 4 issued the 12th of April 1945 officially ended strategic bombing campaign in Europe. The Transport Plan required reducing military rail traffic so tactical airpower could inhibit enemy defenses during first five weeks of Overlord operation.