Normandy Invasion

views updated

NORMANDY INVASION

NORMANDY INVASION, Allied landings in France on 6 June 1944 (D Day), the prelude to the defeat of Nazi Germany in World War II. Known as Operation Overlord, the invasion was scheduled for 5 June but was postponed because of stormy weather. It involved 5,000 ships, the largest armada ever assembled. Although more men went ashore on the first day in the earlier Allied invasion of Sicily, it was overall the greatest amphibious operation in history.

Under command of General Dwight D. Eisenhower, with General Bernard L. Montgomery as ground commander, approximately 130,000 American, British, and Canadian troops landed on beaches extending from the mouth of the Orne River near Caen to the base of the Cotentin Peninsula, a distance of some fifty-five miles. Another 23,000 landed by parachute and glider. Allied aircraft during the day flew 11,000 sorties. Airborne troops began landing soon after midnight; American seaborne troops at 6:30 a.m.; and, because of local tidal conditions, British and Canadian troops at intervals over the next hour. The Allies chose Normandy because of its relatively short distance from British ports and airfields, the existence of particularly strong German defenses of the Atlantic Wall at the closest point to Britain in the Pas de Calais, and the need for early access to a major port (Cherbourg).

On beaches near Caen christened Gold, Juno, and Sword, one Canadian and two British divisions under the British Second Army made it ashore with relative ease, quickly establishing contact with a British airborne division that had captured bridges over the Orne and knocked out a coastal battery that might have enfiladed (heavily fired upon) the beaches. By nightfall the troops were short of the assigned objectives of Bayeux and Caen but held beachheads from two to four miles deep.

The U.S. First Army under Lieutenant General Omar N. Bradley sent the Fourth Infantry Division of the VII Corps ashore farthest west on Utah Beach, north of Carentan, at one of the weakest points of the Atlantic Wall. The 82d and 101st Airborne divisions landing behind the beach helped insure success. Although the air drops were badly scattered and one division landed amid a reserve German division, most essential objectives were in hand by the end of the day.

Under the V Corps, two regiments of the First Infantry Division and one of the Twenty-ninth landed on Omaha Beach, between Bayeux and Carentan. Sharp bluffs, strong defenses, lack of airborne assistance, and the presence of a powerful German division produced near-catastrophic difficulties. Throughout much of the day the fate of this part of the invasion hung in the balance, but inch by inch American troops forced their way inland, so that when night came the beachhead was approximately a mile deep. At a nearby cliff called Pointe du Hoe, the First Ranger Battalion eliminated a German artillery battery.

The invasion sector was defended by the German Seventh Army, a contingent of Army Group B, under overall command of Field Marshal Gerd von Rundstedt. Deluded by Allied deception measures, based in large part on intelligence known as ULTRA, obtained as a result of the British having broken the German wireless enciphering code, the Germans believed, even after the landings had begun, that a second and larger invasion would hit the Pas de Calais and for several weeks held strong forces

there that might have been decisive in Normandy. German defense was further deterred by difficulty in shifting reserves, because of preinvasion bombing of French railroads, disruption of traffic by Allied fighter bombers that earlier had driven German planes from the skies, and French partisans. The bad weather of 5 June and continuing heavy seas on 6 June lulled German troops into a false sense of security. Reluctance of staff officers back in Germany to awaken the German dictator, Adolf Hitler, for approval to commit reserves and tanks delayed a major counterattack against the invasion. The only counterattack on the first day, by a panzer division against the British, was defeated by fire from naval guns.

At the end of D Day, only the Canadians on Juno and the British on Gold had linked their beachheads. More than five miles separated the two American beachheads; the Rangers at Pointe du Hoe were isolated and under siege; and the Fourth Division at Utah Beach had yet to contact the American airborne divisions. Nevertheless, reinforcements and supplies were streaming ashore, even at embattled Omaha Beach, and unjustified concern about landings elsewhere continued to hamper German countermeasures. By the end of the first week, all Allied beachheads were linked and sixteen divisions had landed; only thirteen German divisions opposed them. By the end of June a million Allied troops were ashore.

Several innovations aided the invasion and subsequent buildup. Amphibious tanks equipped with canvas skirts that enabled them to float provided some early fire support on the beaches, although many of the customized tanks sank in the stormy seas. Lengths of big rubber hose (called PLUTO, for Pipe Line Under The Ocean) were laid on the floor of the English Channel for transporting fuel. Given the code name Mulberry, two artificial prefabricated harbors were towed into position at Omaha Beach and Arromanches. These consisted of an inner breakwater constructed of hollow concrete caissons six stories high, which were sunk and anchored in position, and a floating pier that rose and fell with the tide while fixed on concrete posts resting on the sea bottom. Old cargo ships sunk offshore formed an outer breakwater. Although a severe storm on 19 June wrecked the American Mulberry, the British port at Arromanches survived. A sophisticated family of landing craft delivered other supplies directly over the beaches.

Allied casualties on D Day were heaviest at Omaha Beach (2,500) and lightest at Utah (200).American airborne divisions incurred 2,499 casualties. Canadian losses were 1,074; British, 3,000. Of a total of more than 9,000 casualties, approximately one-third were killed.