THE ATLANTIC WALL
Frederick the Great and Sun Tzu agreed that he who tries to defend everything defends nothing. But that’s what Hitler tried to do in the West–from the Arctic Circle to the Spanish Border. Having taken that territory, he was loath to lose an inch of it, and rightly expected the growing force of Allied military strength would eventually try to return to the Continent. Commando raids in Norway and Dieppe, invasions in North Africa, Sicily and Italy itself convinced Hitler his fears were correct but didn’t tell him where the invasion would come from the West. His response was to invest an enormous amount of energy, material and manpower in The Atlantic Wall. Probably the most pervasive impact of that decision was to place large numbers of troops in static positions, largely unable to support each other or form a decisive reserve in response to an invasion.
Hitler’s propaganda machine churned out material designed to mollify the home folks while convincing the Allies that it was folly to attempt penetration of the ‘wall’. Prior to 11 December 1942, that information reached America via Military Attachés in Berlin, Paris and Rome, and from British sources. After the U.S. declared war on Germany, information reached Intelligence files through Attachés in neutral nations and British sources.
The Nazis loved concrete. Typical was a much photographed massive casemate at Wissant, near Calais. Battery Todt (named for the Nazi engineering corps founded by Fritz Todt) was completed in late 1940 and housed four 380mm guns (15″). Situated at Cap-Gris-Nez, the guns were just 19 miles from Dover (within weapons range).
A super heavy gun, probably 380mm, identified only as defending the ‘Kanal’, the German name for the English Channel. This magazine photo may show Battery Todt under construction near Wissant. Similar, if less spectacular, point defenses were being constructed all along The Wall’, starting with ports, most likely landing places, and the most obvious or vulnerable targets. British Commando raids and Dieppe spurred emplacement of guns and, in some ways, steered German selection of sites to defend.
Intended to fend off invasion fleets, batteries featuring heavy guns were gradually extended along the coast to defend more of Nazi-held Europe. Work on the Atlantic Wall continued steadily throughout the war. Strong points, particularly heavy gun positions, weren’t hard for PIs to find. Large disruptions of the earth and masses of concrete stand out as they break the normal patterns of the fields.
This is Noires Mottes, seven miles north of Battery Todt, 15 March 1943.
The three firing bunkers are nearly completed but not yet back-filled with a covering of earth. I don’t see any barrels yet but Battery Lindemann eventually had three 16″ guns. A substantial anti-tank ditch is to the east and south. Apparently the defenders thought the most immediate threat was from an Allied landing near Calais.
A fold seam on the left shows this was probably collected from a German magazine by an American Attaché somewhere. Long-range guns like these were reserved for the most important locations, but there were a lot of field artillery guns and howitzers captured in Russia and France. Guns pulled out of older warships were used (sometimes in their original turrets), captured or damaged tanks provided lighter weapons (again sometimes still in the tank turrets). Smaller garrisons thus armed were steadily showing up in strong points creeping south from Norway and north and south of Calais. Positions with large guns (8″ to 12″) were built ‘gun range’ apart, one about every 20 miles in Normandy. Despite the German boast above, strong points were easy for Allied Intelligence to find on aerial imagery. Camouflage, as above, was mainly for show – aerial imagery in stereo looked right through the netting. Note the fake ‘trees’ on either side of the soldier.
When Field Marshal Erwin Rommel was put in charge of the Atlantic Wall he advocated repulsing an invasion on the beaches. That resulted in a flurry of activity building smaller strong points all along the coast defending possible landing sites.
Typically, in Normandy, a German strong point or ‘Widerstandsnest’ would have one to three field guns, two or three anti-tank guns (50mm, one 88mm if possible), mortars; up to thirty machine-guns and would also be ringed with barbed wire. Some were behind anti-tank ditches and/or minefields. Only the machine-guns and rifles (short range weapons) fired straight at the beach. A strong point’s larger guns were sited to fire toward the shore line at an angle, raking long stretches of beach and engaging enemy forces attacking other strong points to the right and left. Angling orientation also made the main bunkers and casemates harder to spot from the sea or beach and permitted strong concrete walls and mounded earth facing the sea and warship guns.
Less powerful positions also proliferated, filling in the spaces between major strong points and at less likely invasion sites. These German photos were designed to show universal readiness and capability. They ignore the innervating duty of months standing watch with little cover and no threat at hand. Nor do they deal with thousands of troops removed from combat, their support requirements and the cost of maintaining their stations.
Above is a primitive, cold and windy, anti-aircraft position. About all a German soldier could say about this duty was ‘beats being on the Eastern Front’.
Below, a permanent installation with plenty of concrete and three armored open-back turrets for the guns (possibly 4.7″ French). The background bunker is for observation, ranging and control.
Gun positions similar to those on the previous page but without the concrete scarp. Barbed wire and rising land show this position is inland from the coast.
Below, armored protection and camouflage netting for the heavy guns but the troops are living in tents. This may be the same gun shown on page 13.
Propaganda photos of seemingly impregnable gun positions were intended to intimidate, or influence the inevitable invasion to go elsewhere.
In early 1944 Field Marshal Rommel had enough experience with Allied control of the air to understand he would have trouble moving powerful maneuver units to an invasion sector. An invasion would have to be defeated on the beach.
A flurry of activity followed. Some defenses were cheap and easily installed. Of course there was the expected thousands of miles of barbed wire entanglements. Hundreds of thousands of anti-personnel and anti-tank mines were planted on the most likely beaches.
A lot of information filtered out of occupied Europe, even including photographs. At left is part of a British report on Atlantic Wall defenses.
The Soviets were increasing pressure on the Allies for an Invasion in the west to pull German troops from the Eastern Front. That meant the return to Western Europe would have to come sometime in early 1944. The Germans knew that too and accelerated construction of beach defenses.
This photograph shows a heavy coastal battery. Note the ventilators for the personnel who operation from below.
This shows a common type of coastal battery which will still be seen.
Yet another type of layout for coastal batteries.
This casemate near Le Havre was completed but not yet earthed when it was overrun by Allied troops four months after the invasion. It was part of a four gun 155mm battery located 17 miles northeast of the Normandy landing beaches and a potential threat to invasion shipping straying too far east. Twenty-four such batteries (of various hardness and gun-size) were built, or building, in Normandy between Le Havre and Cherbourg. In June 1944, some guns had been withdrawn inland while their earthen emplacements were converted to concrete. Those weapons didn’t threaten the invasion.
Everything at hand was used to create invasion barriers, the cheaper the better because quantity was important. Below, a Belgian beach with concrete bunkers in the background and an old Renault tank turret (shown with the gun removed) as a strong point.
Some remote beaches were only sparsely defended by the most primitive systems – in this case at Gironde, France, a light artillery piece, barbed-wire entanglement and a few posts beyond the high-water mark. Those dunes were also probably mined.
The Germans also produced wire-guided mini-tanks packed with explosives to take out attackers (several of these were found on Utah Beach but artillery fire cut their control wires and they didn’t operate right so did no damage).
Allied invasion planners faced the challenge of where, when and how, and how to get information while maintaining some element of surprise.
Task One would be to select beaches that could take the large forces to be involved.
Task Two was to devise ways to get onto the beaches without prohibitive losses.
Task Three would be get forces through the Atlantic Wall, off the beach and pushing inland behind the defenses.
For answers, Allied planners turned to aerial photoreconnaissance.