The Invasion The invasions of Normandy were planned by 3 countries; The United States, Great Britain and Canada. The counrtries were assigned to 5 different beaches. The United states took the beaches of Omaha and Utah. The British took Gold beach and Sword beach. And the Canadians took Juno beach. Allied forces rehearsed their roles for D-Day months before the invasion. On 28 April 1944, in south Devon on the English coast, 638 U.S. soldiers and sailors were killed when German torpedo boats surprised one of these landing exercises, Exercise Tiger In the months leading up to the invasion, the allied forces conducted a deception operation, Operation Fortitude, aimed at misleading the Germans with respect to the date and place of the invasion.The Allies assigned codenames to the various operations involved in the invasion. Overlord was the name assigned to the establishment of a large-scale lodgement on the northern portion of the Continent. The first phase, the establishment of a secure foothold, was codenamed Neptune. According to the D-day museum: "The armed forces use codenames to refer to the planning and execution of specific military operations. Operation Overlord was the codename for the Allied invasion of northwest Europe. The assault phase of Operation Overlord was known as Operation Neptune. (...) Operation Neptune began on D-Day (6 June 1944) and ended on 30 June 1944. By this time, the Allies had established a firm foothold in Normandy. Operation Overlord also began on D-Day, and continued until Allied forces crossed the River Seine on 19 August 1944." -D-day museum The invasion fleet was drawn from eight different navies, comprising 6,939 vessels: 1,213 warships, 4,126 transport vessels (landing ships and landing craft), and 736 ancillary craft and 864 merchant vessels The overall commander of the Allied Naval Expeditionary Force, providing close protection and bombardment at the beaches, was Admiral Sir Bertram Ramsay. The Allied Naval Expeditionary Force was divided into two Naval Task Forces: Western (Rear-Admiral Alan G Kirk) and Eastern (Rear-Admiral Sir Philip Vian). The Allied invasion plans had called for the capture of Saint-Lô, Caen, and Bayeux on the first day, with all the beaches linked except Utah, and Sword (the last linked with paratroopers) and a front line 10 to 16 kilometres (6–10 mi) from the beaches. However, practically none of these objectives had been achieved. It took 3 months for British and Canadian troops to capture Caen, as they faced 7 heavy Panzer divisions, while their American allies, although advancing more rapidly, faced only 2 of these divisions. Overall the casualties had not been as heavy as some had feared (around 10,000 compared to the 20,000 Churchill had estimated) and the bridgeheads had withstood the expected counterattacks. After the invasion Once the beachhead was established, two artificial Mulberry harbours were towed across the English Channel in segments and made operational around D+3 (9 June). One was constructed at Arrowmanches by British forces, the other at Omaha Beach by American forces. By 19 June, when severe storms interrupted the landing of supplies for several days and destroyed the Omaha harbour, the British had landed 314,547 men, 54,000 vehicles, and 102,000 tons of supplies, while the Americans put ashore 314,504 men, 41,000 vehicles, and 116,000 tons of supplies. Around 9,000 tons of material were landed daily at the Arromanches harbour until the end of August 1944, by which time the port of Cherboug had been secured by the Allies and had begun to return to service.
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