The real history that inspired WW2 film Greyhound

The responsibilities on the shoulders of this devout 42-year-old man are immense and he repeatedly has to make heart-wrenching choices. Should he pick up men in the freezing water or plough on and potentially save more? Every decision, calculation and educated guess regarding the enemy’s next move has potentially fatal consequences, not just for his own ship but for the entire convoy it is his task to protect.

To add to the weight of his responsibility, this is his first transatlantic convoy. Yet by stint of his seniority of rank and age he is the ‘Comescort’ – the overall commander of the four-ship escort of a Canadian corvette, British and Polish destroyers, and his own in the United States Navy.

It is at dawn, having been up all night, that Commander Krause conjures up a picture in his mind of an ideal convoy escort force: “With eight escort vessels and four destroyers a good job could be done,” he thinks, “and air cover.” But this was still 1942 and such forces were not yet available; he would have to make do with what he had.

C S Forester’s The Good Shepherd

The depiction is fictional, but it is brilliantly conveyed by the legendary historical thriller writer C S Forester. Although The Good Shepherd was published in 1955, some 10 years after the Second World War ended, Forester certainly did his research. The evocation of this one 48-hour moment in the Battle of the Atlantic is powerfully done, while the enormity of the decisions and the complexity of commanding a convoy escort is written with a nod to historical accuracy and detail that is second-to-none.

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It’s something of a forgotten classic – or rather, it has been, although not one passed over by Oscar-winning actor Tom Hanks, a self-confessed Second World War nut, who has used Forester’s book to write and star in a new film based on the novel called Greyhound. Hanks plays Commander Krause (in the film he is named Ernest, not George).

The Battle of the Atlantic was the most vital of all campaigns in the Second World War

It’s certainly a great subject for a movie and one that has been ignored for far too long by Hollywood, because the Battle of the Atlantic was an epic of drama and of strategic importance. In fact, it can be argued pretty convincingly that it was the most vital of all campaigns in the Second World War.

• The Battle of the Atlantic: the desperate WW2 campaign featured in Tom Hanks film Greyhound

Why? All shipping in and out of Britain went through the Atlantic. Had the Atlantic been lost, so too would have Britain. There would have been no Mediterranean campaign, no D-Day, no VE Day or VJ Day. The vast, global supply chain upon which the Allies depended – the Soviet Union included – would have been cut, and with it the lifeline.

It was why, from the outset, Britain devoted so much of its energy to winning this most critical of battlegrounds. New inventions came thick and fast, from the development of the cavity magnetron – which enabled the reduction in size of radar so that instead of vast masts it could be fitted onto a ship or aircraft – to rapid improvements in radio technology, stunning intelligence successes, and superbly orchestrated organisation.

In fact, by the end of May 1941, Britain had reached a point where already it could no longer lose the battle, even though another two long years would follow before the U-boat threat in the Atlantic was defeated. Fortunately, before the war, Hitler favoured creating a large surface fleet rather than a sizeable submarine force, even though his warships could never hope to compete with the Royal Navy let alone the French or US navies, and despite the almost war-changing effect U-boats previously had in the First World War.

As a result, the U-boat arm was just 3,000-men strong on the frontline when war broke out, and throughout 1940, when Britain was at its most vulnerable, there were never more than 13 U-boats operating in the Atlantic at any one time. In January 1941, there had been just six. It wasn’t nearly enough in so vast an ocean.

From September 1941, the US Navy had joined the battle in the Atlantic despite having not yet declared war, although after the Japanese entry into the war that December, the mantle was for the most part handed back to the Royal Navy and the rapidly growing Royal Canadian Navy, while the US Navy focussed on the Pacific. Meanwhile, the U-boat fleet grew in number but suffered from faltering experience and equipment that had flat-lined. In contrast, the Allies continued to improve detection techniques and weaponry with a combination of ships and long-range aircraft operating from North America, Iceland and Britain.

By early 1942, the U-boats had been pushed to the east coast of North and South America where there was no convoy system yet in place. A slaughter followed until convoys began to be introduced and the U-boats were pushed back into the mid-Atlantic.

From ‘the hunters’ to ‘the hunted’

U-boats were more effective at night, when detection was harder, as they were also more efficient and faster when operating on the surface. This meant winter, when the nights were longer, provided richer pickings. Yet despite the incredibly vivid depiction of the convoy in the winter of 1942 in The Good Shepherd, U-boats were increasingly becoming the hunted rather than the hunters by this time. Although horrific battles were fought when convoys were successfully intercepted, in all more than 80 per cent of Allied convoys crossed the Atlantic entirely unscathed, and after a renewed effort in the first half of 1943, the Allies were able to finally defeat the u-boats by May 1943. That month, some 41 U-boats were sunk – a totally unsustainable number that led to their withdrawal.

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The Battle of the Atlantic was a brutal one in which nearly 38,000 British sailors alone lost their lives, while a staggering 79 per cent of U-boat crewmen died – the worst of any part of the German armed services. Incredible deeds of heroism were carried out in the battle by both sides, and one that was often fought against a further enemy – the cruel Atlantic Ocean itself.

The importance of this immense battle, and the extraordinary human drama carried out, deserves its time on the big screen – and if any man can deliver this to a wider audience, it is Tom Hanks. Hopes for Greyhound are high…