Professor Michael Goodman and Nige Tassell consider what might have been different in the course of the Second World War \u2013 from D-Day to the Nazi atomic programme \u2013 had the top-secret codebreaking work being carried out at Bletchley Park been unsuccessful <\/p>
From 1940, the Allied war effort received a huge boost when scientists at Bletchley Park<\/a> became able to decipher encrypted instructions sent by the Nazi military command using the Enigma machine. Being able to read these messages proved to be a vital tool that arguably altered the course of the Second World War.<\/p>\n Without it, history might have taken a very different shape. One of the first theatres in which the cracking of Enigma had an impact was the battle of the Atlantic<\/a>, which raged throughout the war in Europe. Until the breakthrough at Bletchley Park, German vessels operating in wolfpacks were able to pick off Allied ships carrying crucial supplies and armaments east across the ocean.<\/p>\n Once in possession of vital intelligence about the enemy\u2019s location, though, an Allied fleet could divert its route and avoid significant loss of life. \u201cKnowing where the wolfpacks were allowed the Allies to simply sail around them,\u201d confirms Michael Goodman, professor of intelligence and international affairs at King\u2019s College London.<\/p>\n \u201cBut how do you conceal from the Germans that you\u2019re reading these codes? You can\u2019t just bypass every single submarine because then it becomes obvious. It\u2019s a classic intelligence conundrum: at what point do you reveal your hand?\u201d<\/p>\n Keeping their cards close to their chest gave the Allies an advantage in the Atlantic, allowing supplies to reach other theatres. \u201cEnigma was a force enabler,\u201d observes Professor Goodman. \u201cIt provided a window into what the Germans were thinking and doing, but it didn\u2019t tell the Allies what to do. It still had to be applied \u2013 but in the Atlantic it saved ships and it saved lives.\u201d<\/p>\n At the start of the Second World War, a talented team of mathematicians and cryptologists was gathered at Bletchley Park in Buckinghamshire. Initially aided by the Polish intelligence services, they were charged with cracking the German Enigma machine, used by the Nazis to encrypt top-level messages.<\/p>\n The experts, notably Alan Turing<\/a>, developed a code-breaking machine and system for deciphering German instructions, which had a significant impact on the direction of the war.<\/p>\n <\/p><\/div> <\/section> Without the cracking of Enigma, would Germany still have ruled the Atlantic\u2019s waves? \u201cI think that\u2019s probably true,\u201d confirms Professor Goodman, before positing another conundrum:<\/p>\n \u201cHad Hitler succeeded in marshalling the Atlantic, would he then have pushed on to the US? Or might he have linked up with the other Axis powers to push into the Americas, not just the US? I\u2019d have been surprised if he had been able to extend into another theatre, but it could have been an option.\u201d<\/p>\n One significant likely consequence of continued German control of the Atlantic has been much discussed: had Enigma not been cracked, it\u2019s unlikely that the war would have ended in 1945. \u201cI absolutely believe Enigma shortened the war,\u201d says Professor Goodman. \u201cThe general consensus is that it did so by two or three years.\u201d<\/p>\n With control of the Atlantic wrested from Germany, the Allies could focus attention elsewhere \u2013 and the work of the codebreakers at Bletchley Park proved fundamental to the success of D-Day<\/a> in 1944.<\/p>\n \u201cThe intelligence that preceded the landings was all about whether the Germans had swallowed the deception plan,\u201d explains Professor Goodman. \u201cDid they believe that it was going to happen farther north along the coast, near Calais rather than in Normandy? And what level of opposition could be expected when the Allies landed? This was totally based on the intelligence gathered. And that was down to cracking Enigma.\u201d<\/p>\n Initially, recruits for Bletchley Park came from the universities of Oxford and Cambridge. As the war progressed, though, they were drawn from various sources, particularly the women\u2019s services. By 1945, 75 per cent of the staff were women<\/a>.<\/p>\n <\/p><\/div> <\/section> Would the Allies have risked an invasion the size and scale of D-Day without the intelligence that had been harvested? \u201cBy then, the war was very much going the Allies\u2019 way, and it was absolutely a decision taken by them that there had to be an invasion of northwest Europe,\u201d explains Professor Goodman.<\/p>\n \u201cBut would it have taken place in the way that it did? And would they have committed as many forces? Possibly not, because for such a deception to succeed, you have to know it\u2019s been swallowed by the enemy. And you couldn\u2019t know that without something like Enigma. Had the deception plan not worked, and had all those German forces still been in Normandy and not redeployed to Calais, the loss of life on the Allies\u2019 side would have been truly horrendous. It was still bad on D-Day.\u201d<\/p>\n <\/p><\/div> <\/section> Without a large-scale invasion like D-Day \u2013 or, at least, one at that particular juncture \u2013 it\u2019s again likely that the war would have lasted longer than it did. And who knows what direction it would have taken in those extra years. Would it, for instance, have given Hitler more time to develop an atomic programme, with dramatic consequences for Europe and the wider world?<\/p>\n Professor Goodman thinks probably not. \u201cThe main German scientists who were captured towards the end of the war were interned in a house in Cambridgeshire,\u201d he explains. \u201cWhen the atomic bomb<\/a> was dropped on Hiroshima<\/a>, the rooms they were in were bugged. It was very clear they didn\u2019t really know how to develop an atomic bomb. Would they have got there in another three years?<\/p>\n \u201cPerhaps they would have grown their V1 and V2 programmes instead. Hitler was certainly turning towards bigger types of weapons like those.\u201d<\/p>\n So it can be suggested that the cracking of Enigma at least indirectly helped avert another devastating Blitz<\/a> for the people of Britain. \u201cWhether these German missiles would have made a strategic difference is another question,\u201d concludes Professor Goodman, \u201cbut certainly the effect on the UK population, both physically and in terms of morale, could have been very significant.\u201d<\/p>\nWinning the battle of the Atlantic<\/h3>\n
In context: Bletchley Park and Enigma<\/h4>\n
Bletchley Park and D-Day<\/h3>\n
Did you know?<\/h4>\n
Women at war<\/h6>\n
More from our alternate history series<\/h4>\n
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