The Atlantic Wall evolved in phases as the war took on changing circumstances for Germany. Many were captured French guns, but also included Russian, British, Czech, Yugoslav, and Dutch as well. The batteries included over two dozen different calibers of weapons ranging from 76mm to 406mm. Some 495 artillery casemates or other emplacements were built for heavy artillery of 150mm or larger in the area of the German Fifteenth Army, north of the Seine River about 200 in the Seventh Army area (Normandy and Brittany) and 65 in the First Army area, along the Bay of Biscay. The number of batteries deployed by 1944 included 22 in Germany’s Helgoland Bay, with 78 guns of over 150mm 70 batteries along the Danish coastline with 293 large caliber guns 225 batteries in Norway with approximately 1,000 guns of 100mm or larger caliber (42 of them of 240mm or larger), and 343 batteries along the French coast, which included 1,348 guns of 150mm or larger. The core of the Wall was its coastal gun batteries. The Germans themselves came to think of the Wall primarily as that portion on the Dutch, Belgian, and French coasts, while defenses along the Norwegian, Danish, and German North Sea coasts consisted mainly of a series of separate fortresses or heavily protected gun emplacements. The Wall included an estimated 15,000 reinforced-concrete structures: munitions bunkers, flak bunkers, troop shelters, infantry and artillery combat bunkers, communication bunkers, depot bunkers for storing supplies and crew-served weapons, combat headquarters bunkers with staff quarters, observation and command bunkers, battery fire-control positions, and support bunkers for machinery, searchlights, and power generators.

Much of the Wall’s lethality was only added in the six months prior to the D-Day landing, due to the efforts of two men-Field Marshals von Rundstedt and Rommel. However, none of these could have been effective without proper leadership. Three elements constituted Germany’s defenses along the Atlantic coast: fire-power, fortifications, and manpower. Yet, while it was hardly a continuous series of defensive structures, or as formidable as Allied planners thought it to be, the Wall did give them pause when planning the assault on Fortress Europe.

The popular image of Hitler’s Atlantic Wall (Atlantikwall) is one of massive bunkers and huge artillery pieces recessed in concrete casemates stretching the length of the Reich’s coastline.

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