The Battle of the Atlantic (2003)


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The Battle of the Atlantic

Author/Presenter: Andrew Williams

Winston Churchill once wrote that "The only thing that ever really frightened me during the war was the U-boat peril". In saying this, he correctly identified the importance of the threat posed during World War Two by German submarines (the 'Unterseeboot') to the Atlantic lifeline. This lifeline was Britain's 'centre of gravity' - the loss of which would probably have led to wholesale defeat in the war.

This three-part cable TV project was advertised as the first documentary series devoted exclusively to the Battle of the Atlantic, the longest and costliest sea battle of WWII, one which ultimately claimed 30,000 lives. The miniseries features archival footage and interviews with survivors from both sides of the conflict, and illustrates emphatically that, despite many Allied victories, the back-and-forth battle might well have turned in the Nazis' favor had the war gone on longer. Individual episodes include "Grey Wolves," "Keeping Secrets," and "The Hunted." Battle of the Atlantic first aired on April 27, 2003


* Grey Wolves

* Keeping Secrets

* The Hunted

The Battle of the Atlantic

By Dr Gary Sheffield

The Battle of the Atlantic was a fight for Britain's very survival. Winston Churchill, wartime prime minister, claimed that the 'U-boat peril' was the only thing that ever really frightened him during World War Two. Here, Gary Sheffield explains why.

The U-boat peril

Winston Churchill once wrote that, '... the only thing that ever really frightened me during the war was the U-boat peril'. In saying this, he correctly identified the importance of the threat posed during World War Two by German submarines (the 'Unterseeboot') to the Atlantic lifeline. This lifeline was Britain's 'centre of gravity' - the loss of which would probably have led to wholesale defeat in the war.

If Germany had prevented merchant ships from carrying food, raw materials, troops and their equipment from North America to Britain, the outcome of World War Two could have been radically different. Britain might have been starved into submission, and her armies would not have been equipped with American-built tanks and vehicles.

Moreover, if the Allies had not been able to move ships about the North Atlantic, it would have been impossible to project British and American land forces ashore in the Mediterranean theatres or on D-Day. Germany's best hope of defeating Britain lay in winning what Churchill christened the 'Battle of the Atlantic'.

Germany had waged a similar campaign in World War One, and in 1917 had come close to defeating Britain. But in spite of this experience neither side was well prepared in 1939. Germany had underestimated the impact of U-boats, and was fighting with only 46 operational vessels, using mostly surface vessels - rather than submarines - to prowl the Atlantic. However, on 3 September 1939, the day Britain declared war on Germany, the British liner Athenia was torpedoed by a U-boat. This marked the beginning of the second Battle of the Atlantic.

In the early stages of World War Two, the Royal Navy placed much faith in ASDIC (an early form of sonar) to detect submerged U-boats. The British were largely able to master the surface threat posed by Germany, sinking the pocket battleship Graf Spee in December 1939 and the battleship Bismarck in 1941, but from the summer of 1940 the U-boat menace grew.

This was in part because the conquest by Germany of Norway and France gave the Germans forward bases, which increased the range of the U-boats and also allowed Focke-Wulf FW200 'Kondor' long-range aircraft to patrol over the Atlantic, carrying out reconnaissance for the U-boats and attacking Allied shipping.

The British were consequently forced to divert their own shipping away from vulnerable UK ports, and were faced with the need to provide convoys with naval escorts for greater stretches of the journey to North America. The Royal Navy was critically short of escort vessels, although this problem was eased somewhat by the arrival of 50 old American destroyers that President Roosevelt gave in return for bases in British territory in the West Indies

U-boats, supplemented by mines, aircraft and surface ships, succeeded in sinking three million tons of Allied shipping between the fall of France in June 1940 and the end of the year. Admiral Dönitz, the commander of the U-boat arm, introduced the 'wolfpack' tactic at the end of 1940, whereby a group of submarines would surface and attack at night, thus greatly reducing the effectiveness of ASDIC.

Not surprisingly, the German submariners called this phase of the war the 'happy time'. This remorseless attrition of merchant shipping was a far greater threat to Britain's survival than the remote possibility of the Kriegsmarine landing German troops on the English coast.

Learning to fight back - with ships

The British survived this period through a number of factors, including the development of improved tactics. Corvettes, small warships of less than 1000 tons, helped to plug the gaps in the Royal Navy's escort capability, and the Allied occupation of Iceland, which belonged to German-occupied Denmark, gave Britain some valuable Atlantic bases.

The emergence of powerful allies was also vital. The Royal Canadian Navy, which was tiny in 1939, began an amazing period of growth that eventually made it capable of bearing a substantial part of the fighting in the North Atlantic. Even more importantly, the United States, although neutral, began to behave in a most un-neutral fashion.

From May 1941 the US Navy became a British ally in the struggle in the Atlantic. By taking over escort duties in the western Atlantic, it became involved in a shooting war with Germany, and on Halloween 1941, the inevitable happened. While escorting a British convoy, an American warship, the destroyer Reuben James, was torpedoed and sunk by the submarine U-562.

This was at a time when Roosevelt still faced fierce opposition from isolationists within the USA, and escort duties in the Battle of the Atlantic had so far been the most that the President could do to bring the USA into the war on the British side. However, eventually this undeclared German-American naval war probably played a role in Hitler's decision to declare war on the USA - in the aftermath of Pearl Harbor.

Apart from ships, two other factors played a vital role in the winning of the Battle of the Atlantic. The first was the aeroplane. One of the major problems faced by the Allies in the early years of the war was the existence of a 'mid-Atlantic gap', an area that could not be reached by friendly aircraft.

It was crucial to find a way of reaching this area, as simply by flying over the sea, aeroplanes could force submarines to submerge and cease activity, and they could, of course, counter the Kondor. Early in the war, fighter aircraft such as the 'Hurricane' could be carried to the mid-Atlantic, and catapulted from the decks of specially adapted ships (known as Catapult Aircraft Merchant ships, or CAMs), although these were 'one-shot weapons', the planes having to ditch in the sea afterwards. Light escort carriers, also capable of carrying aircraft, entered service in September 1941, and these were a major step forward.

The role of long-range aircraft such as the American 'Catalina' flying boat was also crucial for the battle in the mid-Atlantic area, although there is a big question mark over whether the Allies made the best use of their available aircraft.

The B-24D 'Liberator', a very-long-range aircraft, was the victim of a power struggle within the RAF. At first it was used only for the strategic bombing of Germany, the dominant strategy within the RAF at that time, and was only released to Coastal Command towards the end of 1942.

The argument of 'Bomber' Harris had been that the RAF's most useful contribution to the Battle of the Atlantic was to bomb the U-boat pens and production facilities on land - a view that was, and remains, deeply controversial. By the second half of 1943, however, as these longer-range aircraft were released for the sea battle, the mid-Atlantic gap was at last being satisfactorily covered.

The Role of Intelligence

Intelligence was the other major factor in this second Battle of the Atlantic. Both sides at various times were able to read the signal traffic of the other. Britain's ability to break the Enigma codes, and the resulting 'Ultra' intelligence was a priceless advantage, particularly after the Royal Navy (not, as a recent Hollywood movie would have one believe, the Americans) seized an Enigma machine from a captured U-boat in May 1941. Armed with information about where U-boats were patrolling, the British were able to move convoys in safe areas, away from the wolfpacks.

However, the code-breakers at Bletchley Park had a constant battle to keep their information current. German changes to the naval Enigma code at the beginning of 1942 led to a rise in Allied sinkings, as the flow of Ultra intelligence temporarily ceased.

This problem was compounded by the fact that although the USA had entered the war, it did not immediately put into place some protective measures - such as introducing convoys, and 'blacking out' coastal towns. A handful of U-boats operating on the North American and Caribbean seaboards area in the first half of 1942 accounted for nearly 500 Allied ships. The period of this campaign, called Operation Drumbeat, was the second 'happy time' for the German submariners.

The crisis

The crisis of the Battle of the Atlantic came in early 1943. Döntiz, by this time commander of the German Navy, now had 200 operational U-boats. British supplies, especially of oil, were running out, and it became a question of whether Allied shipyards could build merchant ships fast enough to replace the tonnage that was being sunk. Mass production of Liberty Ships in US shipyards, however, helped to ensure that the Allies would win this race.

At sea, the situation was saved by aggressive anti-submarine tactics, by new technology - better weapons and radio, the long-range aircraft Liberator being equipped with centimetric radar - and, eventually, by a revived Ultra intelligence.

By April the U-boats were clearly struggling to make an impact. Even worse, from Hitler's point of view, was the fact that Allied sinkings of German submarines began to escalate, with 45 being destroyed in the months of April and May. Döntiz, recognising that the U-boat's moment had passed, called off the battle on 23 May 1943.

This was not the end of the threat in the Atlantic, but thereafter it was greatly diminished. After his withdrawal, Hitler insisted on keeping troops on the Baltic coastline, even after they had been cut off by advancing Soviet troops, in order to maintain possession of a testing ground for new types of U-boats. By the end of the war, the Germans had indeed produced new types of 'super-submarines', the Types XXI and XXIII, and these would have been very dangerous had they been introduced earlier.

The Battle of the Atlantic was one of the longest campaigns of World War Two, and it was proportionally among the most costly. Between 75,000 and 85,000 Allied seamen were killed.

About 28,000 - out of 41,000 - U-boat crew were killed during World War Two, and some two-thirds of these died in the course of the Battle of the Atlantic. The stakes could not have been higher. If the U-boats had prevailed, the western Allies could not have been successful in the war against Germany.

Source: BBC


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