Britain Cracked Enigma — American Movies Say They Did It
British WW2 Tales
Dec 28, 2025
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#wwii #enigma #bletchleypark
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Bletchley Park. England. 1940.
- Thousands of British mathematicians, linguists, and codebreakers worked in secret.
- Their mission: crack the 'unbreakable' German Enigma machine.
- Alan Turing built a machine to decode Nazi messages.
- Gordon Welchman revolutionized the process.
- British intelligence read German communications in real time.
- Historians estimate breaking Enigma shortened the war by two years.
- Millions of lives saved.
Then Hollywood made a movie about it.
- U-571. Year 2000.
- American sailors capture an Enigma machine from a German submarine.
- American heroes crack the code.
- American ingenuity wins the war.
One problem.
- None of it happened.
- The British captured Enigma machines.
- The British broke the code.
- The British ran the entire operation.
- But the movie was a blockbuster.
- And millions of people now believe Americans cracked Enigma.
- The British work was classified until the 1970s.
- By the time the truth came out, the fake story had already set in concrete.
- This is how Hollywood rewrote one of Britain's greatest achievements — and got away with it.
#wwii #enigma #bletchleypark #alanturing #U571 #hollywood #britishhistory #ww2history #forgottenhistory #codebreakers
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Peter Burgess COMMENTARY
I was born in 1940 in the early days of WWII. We lived near London in a place called Surbiton, close enough for attacks on London to spill over into out neighborhood.
After the war, I learned a lot about various aspects of hostilities from a British perspective, and many decades later I still remember much of what I learned during that period of my life.
I have lived in the USA since the late 1960s ... for more than 60 years ... and I have been annoyed and disgusted at the limited level of knowledge most Americans have about WWII and world affairs since that time.
I find this little piece about the Enigma codes and Bletchley Park to be fascinating ... not to mention the creation of a fake Hollywood version of this history!
Peter Burgess
Transcript
- 0:00
- May 1943,
- North Atlantic. Ubot headquarters in
- Laurent received a coded message from
- U110
- under attack. Position compromised. The
- signal ended abruptly. Capatan Lloyd Nut
- Fritz Julius LMP had been transmitting
- routine weather data when British
- destroyers appeared from a direction
- they shouldn't have known to search. By
- the time U 1110 crash dived, depth
- charges were already falling with
- uncanny accuracy. German Naval Command
- reviewed the incident with growing
- unease. This wasn't the first time.
- British convoy escorts were appearing
- exactly where Yubot gathered. Rav
- Coastal Command bombers were finding
- submarines in vast stretches of ocean
- where chance encounters should be
- impossible. Admiral Donuts ordered an
- investigation. The Enigma encryption
- system was tested, retested, analyzed by
- Germany's finest cryptographers. Their
- conclusion mathematically unbreakable.
- The machine generated 159 million
- 1:02
- million million possible settings. Even
- if the British captured an Enigma
- machine, they couldn't read German
- messages without knowing daily key
- settings. The system was secure. It had
- to be. 70 years later, a Hollywood film
- would show American sailors capturing an
- Enigma machine from U 571, cracking Nazi
- codes and winning the Battle of the
- Atlantic. The Americans watching that
- film in cinemas didn't know they were
- watching a lie. The Germans transmitting
- messages in 1943 didn't know their
- unbreakable cipher had been broken by
- British mathematicians in a country
- estate in Buckinghamshire 3 years
- earlier. To German cryptographers in
- 1939, Enigma represented the pinnacle of
- secure military communications. The
- machine itself was elegant. A series of
- rotating wheels called rotors, each
- wired internally to scramble letters
- through 26 possible positions. Three
- rotors created 17,576
- 2:00
- possible combinations. Add a plug board
- that swapped letter pairs before
- encryption, and the permutations became
- astronomical. A message typed into
- Enigma emerged as seemingly random
- gibberish. Only another Enigma machine
- with identical rotor positions and
- plugboard settings could decrypt it. The
- German military changed these settings
- daily using code books distributed to
- units across Europe, North Africa, and
- the Atlantic. Without the code book, an
- intercepted message was worthless noise.
- German signals intelligence had analyzed
- Enigma exhaustively before adopting it.
- Their conclusion documented in a 1937
- Vermacht technical assessment. Breaking
- Enigma encryption through crypt analysis
- would require computational resources
- beyond any nation's capability. The
- system is absolutely secure for military
- communications.
- Then the logic was sound. British
- codereers at the government code and
- cipher school had been intercepting
- German messages since 1939.
- 3:00
- They possessed captured Enigma machines.
- They understood the mechanical
- principles. None of it mattered without
- the daily settings. A Luftvafa signals
- officer wrote in his diary in November
- 1939.
- Our communications are impenetrable. The
- British may intercept our transmissions,
- but they hear only meaningless letters.
- We transmit in absolute security. That
- assessment was shared across German
- command. Craig's marine hubot
- coordinated wolfpack attacks by radio,
- confident that British listeners
- couldn't decipher their positions or
- tactics. Vermached units in North Africa
- requested supplies and reinforcements by
- wireless without concern that the enemy
- might intercept. The Luftwafa broadcast
- bombing raid coordinates and enigma
- encrypted messages. Germany waged war
- assuming strategic communication
- security. That assumption was about to
- collapse. Bletchley Park, a Victorian
- mansion 50 mi north of London,
- requisitioned in 1938 as the wartime
- 4:02
- home of British codereing operations. In
- September 1939, as Germany invaded
- Poland, a small team of mathematicians,
- linguists, and chess champions assembled
- in wooden huts erected on the mansion's
- lawn. Their mission, break Enigma. The
- task seemed impossible. The German
- military changed Enigma settings at
- midnight every day. Even with captured
- machines, codereers had only 24 hours to
- determine rotor positions, plugboard
- settings, and ring positions before the
- settings changed, and the entire process
- began again. Trying every possible
- combination would take longer than the
- universe had existed. A young Cambridge
- mathematician named Alan Turing proposed
- something different. Don't try every
- combination.
- build a machine that could test logical
- contradictions in encrypted messages
- until it found a settings that made
- sense. The concept was brilliant. The
- execution required engineering that
- didn't exist. By March 1940, Turring and
- 5:01
- colleague Gordon Welchman had designed
- the bomb, an electromechanical computer
- that could test enigma settings at
- speeds impossible for human crypt
- analysis. The first bomb installed in
- Hut 1 at Bletchley Park stood 8 feet
- tall, weighed a ton, and contained 108
- rotating drums simulating Enigma rotors.
- It clattered through settings whilst
- testing for logical consistencies in
- encrypted text. When it found a possible
- match, it stopped. Operators then tested
- that setting manually. The process
- worked. On the 22nd of May 1940, the
- bomb broke its first German air force
- key, Bletchley Park could read Luftwafa
- communications. The intelligence was
- cenamed ultra higher than top secret.
- Churchill received daily summaries. Raph
- Fighter Command gained advanced warning
- of German raids, but the Marines naval
- enigma remained unbroken. Ubot used a
- more sophisticated version with four
- rotors instead of three, multiplying the
- 6:01
- possible combinations 26-fold. The
- breakthrough came from an unexpected
- source. In February 1940, Polish
- cryptographers who had been working on
- Enigma since 1932 escaped to France,
- then Britain after France fell. Marian
- Rajookski, Jersey Retski, and Henrik
- Ziggielski brought something invaluable.
- Years of theoretical work on Enigma's
- mathematical vulnerabilities.
- They had built the first enigma breaking
- machines in Warsaw before the war. Their
- work provided the foundation for
- Bletchley's bombs. A British
- cryptonalist later wrote, 'The Poles
- gave us the theory. Turring gave us the
- machine. Together, they gave us
- Germany's secrets.' By late 1941,
- Bletchley Park was breaking German Army
- and Air Force Enigma keys regularly.
- Naval Enigma remained elusive until
- captured Yubot code books finally
- provided the missing pieces. The
- intelligence flowing from Bletchley
- transformed from trickle to flood. But
- 7:02
- Germany never knew. The scale of
- Bletchley Park's operation would have
- shocked German intelligence. By 1943,
- over 9,000 personnel worked in
- roundthe-clock shifts. Threearters were
- women. Rens operating bombs, linguists
- translating decrypted messages, analysts
- identifying tactical patterns. The site
- eventually housed 210 bombs running
- continuously. They broke on average
- 3,000 German messages per day, every
- yubot position in the Atlantic, every
- vermached supply convoy in North Africa,
- every Luftvafa raid being planned
- against Britain. The intelligence was so
- comprehensive that British commanders
- faced a dangerous problem. Using it too
- obviously would alert Germany that
- Enigma was compromised. A rigid protocol
- developed. Ultra intelligence could only
- be acted upon if a plausible alternative
- explanation existed. If Bletchley
- decrypted Yubot positions, RAF Coastal
- Command had to spot the submarine
- 8:00
- visually before attacking. If Ultra
- revealed a convoy route, Royal Navy
- ships had to conduct visible
- reconnaissance first. The deception
- worked because Germany couldn't conceive
- their cipher was broken. In October
- 1942, British destroyers HMS Petard and
- HMS Hero Depth charged 59 in the
- Mediterranean. As the submarine
- surfaced, two British sailors,
- Lieutenant Anthony Fasen and Abel Seaman
- Colin Graasier, boarded the sinking
- Ubot. They seized Enigma code books and
- rotors whilst water poured into the
- control room. Both men drowned
- retrieving those documents. The code
- books reached Bletchley Park 3 days
- later. They contained the keys to Marine
- Enigma settings for weeks ahead. The
- intelligence breakthrough came just as
- the Battle of the Atlantic reached its
- crisis. Yubot were sinking merchant
- ships faster than Britain could replace
- them. With naval Enigma broken, British
- convoy routing could avoid Wolfpack
- concentrations. Sinkings dropped
- dramatically. AR's marine analysis from
- 9:01
- March 1943 noted with frustration,
- British convoys consistently avoid our
- patrol lines. We position Wolfpacks
- across their projected routes. The
- convoys appear 200 m away. Either
- British intelligence has achieved the
- impossible or we face unprecedented
- luck. It wasn't luck. It was
- mathematics, engineering, and 9,000
- people keeping the war's most important
- secret. The impact of ultra intelligence
- on allied victory remains debated, but
- historians generally agree it shortened
- the war by at least two years. At
- Elamagne in October 1942, Montgomery
- knew Raml supply situation, fuel
- reserves, and planned counterattacks
- before they happened. All from decrypted
- enigma messages. In the Atlantic, yubot
- losses escalated as convoys were
- rerouted around German positions. During
- the D-Day landings, Allied commanders
- read German defensive plans and
- reinforcement schedules whilst Hitler's
- general still believed Enigma was
- 10:01
- secure. A German signals officer
- captured in Normandy told interrogators,
- 'We assumed our communications were
- safe. You're telling me you read
- everything for years? Impossible.' The
- British showed him decrypted copies of
- his own messages.
- He stopped talking. Here's where the
- story gets stolen. The 2000 film U571
- depicts American sailors capturing an
- Enigma machine from a German submarine,
- breaking Nazi codes, and turning the
- tide of the Atlantic War. The film was
- financially successful. It won an Oscar.
- It was also historically fraudulent.
- U 571 was sunk by Australian aircraft in
- 1944 after Enigma was already broken. No
- American forces captured naval Enigma
- machines during the war. The actual
- Yubot captures that provided Enigma
- materials were British operations.
- U 1110 captured by HMS Bulldog in May
- 11:02
- 1941.
- U 559's code book seized by Royal Navy
- sailors who died retrieving them. U 505
- captured by USS Guadal Canal in 1944
- after the codes were already broken. The
- film's producers defended the historical
- fabrication as dramatic license. British
- veterans who had worked at Bletchley
- Park called it something else, theft of
- their history. The U 571 controversy
- reached the British Parliament. Members
- demanded an apology from the filmmakers.
- The film's director, Jonathan Mosto,
- eventually added a disclaimer to the
- film's credits, acknowledging that
- British forces actually captured Enigma
- materials. The disclaimer appeared for 3
- seconds. Most cinema audiences missed
- it. A generation of Americans left
- theaters believing their countrymen had
- broken Enigma. A British Bletchley Park
- veteran, now in his 80s, told a
- journalist, 'We worked in absolute
- 12:01
- secrecy for 50 years, couldn't tell our
- families what we'd done.' When The
- Secret was finally declassified in the
- 1970s, we thought people would know.
- Then Hollywood rewrites history, and
- suddenly Americans think they did our
- work. The pattern repeated. The 2014
- film The Imitation Game focused on Alan
- Touring's brilliant contributions, but
- largely ignored the Polish
- cryptographers whose pre-war work made
- British success possible. Marian Rajeski
- developed the theoretical mathematics
- for breaking Enigma in 1932,
- 7 years before Bletchley Park existed.
- The Poles built the first Enigma
- breaking machines called Bomba
- Cryptologix cryptologic bombs. When
- Poland fell in 1939, Polish
- cryptographers brought their research to
- France, then Britain. They handed
- British codereakers years of advanced
- mathematical work. The imitation game
- reduced Polish contributions to a brief
- mention. One Polish veteran interviewed
- 13:00
- before his death said simply, 'We gave
- them the key. They built the house. Then
- they forgot we existed.' Germany never
- discovered Enigma was broken during the
- war. After defeat in 1945, captured
- cryptographers were interrogated about
- their cipher security. They remained
- convinced Enigma was unbreakable. When
- shown decrypted German messages, some
- refused to believe they were genuine.
- Agreeds marine signals officer shown his
- own decoded transmissions from 1943
- insisted they must be fabrications. No
- one could break Enigma. The mathematics
- made it impossible. The psychological
- denial was understandable. Accepting
- that Enigma had been compromised meant
- accepting that every operation, every
- attack, every defensive position had
- been potentially compromised. That
- German soldiers had died because their
- secure communications were being read by
- the enemy. That the vaunted German
- technical superiority and cryptography
- was an illusion. It was easier to deny
- 14:01
- than accept. Bletchley Park fell into
- neglect after the war. The site was
- nearly demolished in 1991 for housing
- development. Veterans who had worked
- there in secrecy for decades lobbied to
- preserve it. The mansion and several
- huts became a museum in 1993. Visitors
- can see reconstructed bombs, walk
- through the huts where crypt analysts
- worked, and learn about operations that
- remained classified for 50 years after
- the war ended. American tourists visit.
- Some express surprise learning that
- British codereakers, not American
- sailors from Hollywood films, broke
- Enigma. A museum guide reports that
- roughly one in four American visitors
- asks some version of, 'But didn't we
- capture the Enigma machine from a Yubot?
- Sometimes they believe him.' The truth
- about Enigma is this. Polish
- mathematicians laid the theoretical
- groundwork before the war. British
- mathematicians, engineers, and thousands
- of support staff built the machines and
- organization to break German codes at
- 15:00
- industrial scale. American forces
- contributed materially to Allied victory
- through production, manpower, and
- eventually direct combat. But Americans
- didn't break Enigma. They weren't at
- Bletchley Park. They didn't build the
- bombs. They didn't intercept and decrypt
- 3,000 German messages per day for 5
- years. That was Britain's war. The
- invisible one fought with mathematics
- instead of guns. Hollywood rewrites this
- history because American audiences
- prefer stories where Americans are
- heroes. That's understandable. It's also
- a disservice to history and to the
- thousands of British and Polish pod
- breakers whose actual achievements were
- extraordinary enough without
- embellishment. Alan Turing didn't need
- American nationality to be a genius. The
- Rens operating bombs in 12-hour shifts
- didn't need Hollywood's approval to be
- crucial to victory. Fasten and Graaser
- didn't need to be American to be heroes.
- They drowned retrieving Enigma code
- books that helped win the Battle of the
- 16:00
- Atlantic. Their sacrifice was real.
- The Hollywood version isn't Germany lost
- the war for many reasons. superior
- allied production, strategic
- overextension,
- tactical mistakes, underestimating
- Soviet resilience. But one reason
- remains underappreciated. For 5 years,
- Britain read Germany's mail. Every yubot
- position, every supply convoy, every
- defensive plan. Enigma was Germany's
- guarantee of secure communications.
- Bletchley Park made it Britain's window
- into German strategy. The codereers at
- Bletchley didn't storm beaches or fly
- bombers. They did something harder. They
- broke mathematics itself. Some victories
- are won with guns, others with
- equations. History should remember who
- actually solved
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