Clearing the Air

Allied air campaign paves the way for D-Day success at Normandy

Story by By Staff Sgt. Ryan Crane

Republic P-47N Thunderbolt, Thunderbolt flew its first combat  mission--a sweep over Western Europe.

Republic P-47N Thunderbolt, Thunderbolt flew its first combat mission–a sweep over Western Europe. Used as both a high-altitude escort fighter and a low-level fighter-bomber, the P-47 quickly gained a reputation for ruggedness. Its sturdy construction and air-cooled radial engine enabled the Thunderbolt to absorb severe battle damage and keep flying.

The mention of “D-Day” conjures iconic images of men storming a beach riddled with barbed wire, smoke and craters created by German mortar batteries; of men advancing toward machine gun nests and acts of heroism as they made their way inland to secure a foothold in mainland Europe.

However, without the efforts made by the Allied air campaign in the months prior, D-Day would have never been possible.

“The Allies disrupted aircraft production,” said Billy Harris, a U.S. Air Forces in Europe and Air Forces Africa historian. “More importantly, they inflicted severe losses on the Luftwaffe in air-to-air combat as it tried to defend the factories. Allies also hit airfields within 350 miles of the beachhead with 6,700 tons of bombs, and the Germans withdrew many of their fighters to protect Germany.”

The figure of 127 downed Allied aircraft during the battle of Normandy may pale in comparison to the estimated 10,000 Allied casualties from the ground, but the casualties surely would have been much greater, had they not conducted such a successful air campaign in the months prior.

P-47 from the USAAF’s strategic 8th Air Force attacking an antiaircraft (or “flak”) tower.

P-47 from the USAAF’s strategic 8th Air Force attacking an antiaircraft (or “flak”) tower. At times, the strategic air forces were also used against the German army and Luftwaffe airfields in Europe. (U.S. Air Force photo)

The planning for D-Day, dubbed “Overlord,” began more than two years prior, when the Combined Chiefs of Staff approved the general invasion plan that would ultimately be carried out by Gen. Dwight D. Eisenhower, who took over as the commander of the European theater just a few months before the invasion.

From the beginning of planning it was recognized that the air component to the invasion was going to be critical. From experience, the Allies knew facing an air adversary over the battlefront was not going to be successful, so they planned on crippling the Luftwaffe in strategic stages leading up to the invasion.

The Allies had the perfect combination of warfighting planes to deal a devastating blow to the German air arsenal.

“Both the P-47 and P-51 were veritable workhorses during the war,” Harris said. “The sleek, highly maneuverable P-51 proved ideal for long range escort missions and an equal match to the Luftwaffe’s fighters. Pilots who flew it praised its maneuverability and visibility during close-order engagements with enemy fighters.

“The heavier P-47, also capable of short and medium-range escort and a formidable foe during dogfights, proved ideal during interdiction missions,” he said. “Capable of carrying half the bomb load of a B-17, the P-47 Thunderbolts of (the) Ninth Air Force inflicted significant damage on enemy ground forces throughout the Normandy campaign.”

During the battle, the aircraft concentrated on battlefield interdiction and close air support.

Airpower was incredibly important to the success of Allied forces during D-Day. During the battle, the aircraft concentrated on battlefield interdiction and close air support. (U.S. Air Force file photo)

The air campaign had three stages: disable the Luftwaffe; cut off main supply roads; and once the invasion began, focus on battle field interdiction and close air support.

From January to June 1944, the five months leading up to D-Day, the Allies had effectively clipped the wings of the German Luftwaffe. The Allied air forces engaged the Luftwaffe wherever they found them, while bombers sought out enemy “nests” in France and Germany.

By the end of May, bombers had neutralized dozens of airfields and severely crippled Germany’s aircraft industry. As a result, on the eve of Normandy the Luftwaffe had been reduced to less than half of its original air assets. In May alone, 570 German aircraft were destroyed, which equated to roughly 25 percent of their total force in the span of 30 days.

Another goal of the Overlord plan involved the destruction of the enemy’s rail communications. Of particular interest were the rail lines leading toward the Overlord beach areas. To meet this objective, Allied air forces unleashed heavy and medium bombers to engage marshalling yards. Meanwhile, fighters attacked rolling stock and troop concentrations. Pilots claimed 475 locomotives and hundreds of railcars loaded with munitions, supplies and troops. In turn, the attacks demoralized German forces which delayed reinforcements to the Overlord areas.

The Allies were not without their own losses, though. In that period leading up to the invasion, the Allies lost more than 12,000 men and 2,000 aircraft.

D-Day paratrooper on display in the Air Power Gallery at the National Museum of the U.S. Air Force.

DAYTON, Ohio – D-Day paratrooper on display in the Air Power Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

“Without a doubt, the air campaign was a key part of reducing the Luftwaffe’s capabilities,” Harris said. “Between Feb. 1 and June 1, the Luftwaffe lost 8,445 fighters. That equated to pilot losses of 20-25-percent each month, resulting in a staggering turnover of crews. It also meant diminished experience and crippling losses that could not be replaced. The tremendous valor and sacrifice of Allied aircrews ensured marginal Luftwaffe presence over Normandy in June.”

By the time of the invasion, the Luftwaffe was barely able to generate 100 sorties to respond to the Allied invasion on the coast of France.

The importance of airpower was evident even before World War II, but the success of the air campaign leading up to Normandy solidified air supremacy as a key component in our multi-faceted military.

“The Luftwaffe was a formidable foe,” Harris said. “It had proven its abilities over England, France and Russia. One can only imagine the havoc 8,000 fighters would have unleashed on the troop ships approaching the beaches, not to mention the carnage on the beaches themselves.”

A-20 Havocs, assigned to the 9th Air Force, return to the Pointe du Hoe coastal battery May 22, 1944.

A-20 Havocs, assigned to the 9th Air Force, return to the Pointe du Hoe coastal battery May 22, 1944. This installation was one of the first objectives captured during the D-Day invasion. (U.S. Air Force file photo)

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