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The FReeper Foxhole Remembers Ultra (1940 - 1945) - July 14th, 2005
Military History Quarterly | Spring 2002 | Williamson Murray

Posted on 07/13/2005 10:29:25 PM PDT by SAMWolf



Lord,

Keep our Troops forever in Your care

Give them victory over the enemy...

Grant them a safe and swift return...

Bless those who mourn the lost.
.

FReepers from the Foxhole join in prayer
for all those serving their country at this time.


.................................................................. .................... ...........................................

U.S. Military History, Current Events and Veterans Issues

Where Duty, Honor and Country
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The FReeper Foxhole is dedicated to Veterans of our Nation's military forces and to others who are affected in their relationships with Veterans.

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Ultra:
Misunderstood Allied Secret Weapon

The importance of decrypted German radio transmissions to Allied victory is well documented. Almost forgotten, however, is the fact that Ultra intelligence was sometimes squandered.

The full contribution of intelligence to the winning of World War II is clear only now, nearly sixty years after that conflict. Over the intervening decades it has been discovered that throughout the war the intelligence services of the Western powers (particularly the British) intercepted, broke, and read significant portions of the German military's top-secret message traffic. That cryptographic intelligence, disseminated to Allied commanders under the code name Ultra, played a significant role in the effort to defeat the Germans and achieve an Allied victory.



The breaking of the high-level German codes began with the efforts of the Polish secret service in the interwar period. By creating a copy of the basic German enciphering machine, the Poles managed to read German signal traffic throughout the 1930s with varying degrees of success. However, shortly before the Munich conference in September 1938, the Germans made alterations to their enciphering machine—the so-called Enigma machine—and in mid-September, darkness closed over German message traffic. The Poles continued their work, however, and after France and Britain's guarantee of Polish independence in March 1939, they passed along to the British what they had thus far achieved. Considerable cooperation had also existed earlier between the Poles and the French. Building on what they had learned from their Continental allies, British cryptanalysts finally cracked some of the German codes in April 1940, just before the great offensive against France and the Low Countries.

Other successes soon followed and gave Allied intelligence officers and commanders valuable insights into German intentions and capabilities. Nevertheless, the British were only able to break a small proportion of the specific codes used by the Wehrmacht. At the end of 1943, the Kriegsmarine, for example, used up to forty different ciphers, all requiring different Enigma machine settings. During the Battle of the Atlantic, the transmissions from U-boats to shore and from the commander of submarines to his boats received the highest priorities from cryptanalysts at Bletchley Park, the location of the British decoding efforts in Europe.



Even with the exceptional resources available there and at that time, it took experts several days and in some cases up to a week to find solutions for a particular day's settings on the Enigma machine. The task of getting invaluable intelligence information out to the field where it could be of direct help was, of course, immensely difficult, especially given fears that if the Germans found out that their codes were being compromised on a daily basis, Ultra intelligence would dry up.

In 1940 during the Battle of Britain, this need for concealment was not great, but as the war spread throughout Europe and the Mediterranean, it became an increasing problem. Accordingly, the British and their American allies evolved a carefully segregated intelligence system that limited the flow of Ultra to a select number of senior officers. The Ultra information dissemination process lay outside normal intelligence channels. For example, the intelligence officers of the Eighth Air Force would not be aware of the existence of Ultra and would therefore not know the duties of the Ultra liaison officers. Those officers, in turn, would forward Ultra intelligence only to the commanders of the Eighth and Ninth Air Forces. The system seems to have worked, for the Germans never caught on to how extensively their ciphers had been compromised.



Unfortunately, there were drawbacks. Intelligence is used only if it reaches those who understand its significance. Three specific incidents underline this point with great clarity. The first occurred in early September 1944, as Allied armies pursued the beaten Wehrmacht to the Third Reich's frontiers. On September 5, Bletchley Park made the following decryption available to Allied commanders in Western Europe:

For rest and refit of panzer formations, Heeresgruppe Baker [Army Group B] ordered afternoon fourth [September 4] to remain in operation with battleworthy elements: two panzer, one-six panzer [Second, Sixteenth Panzer Divisions], nine SS and one nought [Ninth, Tenth] SS panzer divisions, elements not operating to be transferred by AOK [controlling army] five for rest and refit in area Venloo-Arnhem-Hertogenbosch.

This intelligence, along with a second confirmation on September 6, indicated that at the very time when the British-planned Operation Market-Garden was moving forward, some of Germany's best panzer divisions would be refitting in the town selected as the goal of the British First Airborne Division and the operation's final objective on the Rhine—Arnhem. Putting this message together with intelligence that soon emerged from the Dutch underground in Holland that SS panzer units were refitting in the neighborhood of Arnhem, Allied commanders should have recognized that Operation Market-Garden had little prospect of success. Unfortunately, they did not put these pieces together, and officers at the highest level at Field Marshal Sir Bernard L. Montgomery's headquarters who had access to Ultra also failed to draw the correct conclusions.



A second example comes from a period three months after Operation Market-Garden, in December 1944. An unfortunate result of the rush to publish after the existence of Ultra became known to the public in the early 1970s has been the appearance of a number of legends. One of the most persistent is the belief that Ultra gave no advance warning to Allied commanders in December 1944 that the Germans were about to launch a major thrust through the Ardennes. Admittedly, Hitler's intuition suggested to him that German security had been compromised and led him to undertake a series of unprecedented measures to veil the Ardennes attack. Still, there were overt indications even in the high-level codes about German operational intentions. Ultra, however, pointed to a number of other indicators. These suggested that the Wehrmacht was moving supplies of ammunition and fuel into the region behind the Ardennes. Since the Germans were desperately low on such materiel, the allocations of resources could only portend major operations to come in the Ardennes. The German high command had no reason to expect that the Allies were planning to launch a major offensive in this area, especially since they were so obviously trying to kick in the door to the Reich at so many other points. Unfortunately, the mood in the higher Allied headquarters and in intelligence circles was euphoric—the war was almost over, and the Germans could not possibly launch an offensive.

The third case of Ultra information not being used occurred during the Battle of the Atlantic. By 1943 the Allies were using Ultra, when available, in moving their convoys across the North Atlantic, so that the great formations of merchant shipping could avoid submarine patrol lines. In one particular case, decodings had picked up a heavy concentration of German submarines north of the Azores. Thus, a major convoy of aviation fuel tankers from the refineries at Trinidad to the Mediterranean was rerouted to the south of the Azores. Unfortunately, because his escorts needed refueling and the weather was better north of those islands, the convoy commander disregarded his instructions, sailed north of the Azores, and ran smack into the U-boats. Only two tankers reached port. What made the episode even more surprising was the fact that the convoy commander had just served a tour of duty in the Admiralty's convoy and routing section, where he surely must have had some awareness of the reasons for rerouting convoys.



If some commanders occasionally misused Ultra intelligence, such instances were the exception rather than the rule. It is, however, difficult to assess Ultra's full impact on the conflict. At times, particularly early in the war, no matter how much Ultra informed the British of German intentions, the Wehrmacht's overwhelming superiority made successful use of the information virtually impossible. For example, decoded Enigma messages in the spring of 1941 warned the British about German intentions against the Balkan states, first Greece and then—after the anti-German coup in Yugoslavia—against that country as well. Such intelligence, of course, was of extremely limited value due to the overwhelming forces that Hitler deployed in the region.

On the other hand, the intercepts and decrypts in the summers of 1941 and 1942 gave the British government, and Churchill in particular, an accurate picture of Erwin Rommel's tank strength. That information indicated that the British army had considerable superiority in numbers in the North African theater against the Afrika Korps. These quantitative returns could not indicate, however, such factors as the technological superiority of German tanks and particularly the qualitative edge in doctrine and training that the Germans enjoyed. The intercepts, however, explain why Churchill kept consistent pressure on British Eighth Army commanders to attack the Afrika Korps.



TOPICS: VetsCoR
KEYWORDS: bletchleypark; codebreakers; cryptanalysts; cryptology; enigma; freeperfoxhole; ultra; veterans; wwii
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To: Diver Dave
my hand-writing could be considered an encrypted message

LOL. Mine too. It wouldn't do any good since encrypted messages are supposed to eventually be read by someone!

21 posted on 07/14/2005 9:58:16 AM PDT by snippy_about_it (Fall in --> The FReeper Foxhole. America's History. America's Soul.)
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To: vox_PL

Wonderful information, thanks for putting it together and sharing it with us. :-)


22 posted on 07/14/2005 9:59:12 AM PDT by snippy_about_it (Fall in --> The FReeper Foxhole. America's History. America's Soul.)
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To: w_over_w

Good morning sweets.


23 posted on 07/14/2005 10:04:56 AM PDT by snippy_about_it (Fall in --> The FReeper Foxhole. America's History. America's Soul.)
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To: The Mayor

Thank you Mayor. How's the race going? Anyone drop out yet?


24 posted on 07/14/2005 10:06:35 AM PDT by snippy_about_it (Fall in --> The FReeper Foxhole. America's History. America's Soul.)
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To: bentfeather

Good morning feather.


25 posted on 07/14/2005 10:06:55 AM PDT by snippy_about_it (Fall in --> The FReeper Foxhole. America's History. America's Soul.)
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To: Valin

Cool!!!


26 posted on 07/14/2005 10:19:49 AM PDT by snippy_about_it (Fall in --> The FReeper Foxhole. America's History. America's Soul.)
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To: Professional Engineer

Hey, I think I've been there. :-)


27 posted on 07/14/2005 10:20:23 AM PDT by snippy_about_it (Fall in --> The FReeper Foxhole. America's History. America's Soul.)
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To: w_over_w
the only reason I sat in the front row is because the girls in my classes were always a distraction

LOL. Forcing yourself to the front row, now that's discipline.

28 posted on 07/14/2005 10:21:32 AM PDT by snippy_about_it (Fall in --> The FReeper Foxhole. America's History. America's Soul.)
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To: E.G.C.

Get well soon.


29 posted on 07/14/2005 10:22:06 AM PDT by snippy_about_it (Fall in --> The FReeper Foxhole. America's History. America's Soul.)
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To: Valin

WOW! I wonder If I can get in in an A-10


30 posted on 07/14/2005 10:26:29 AM PDT by SAMWolf (Why is there a permanent press setting on an iron?)
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To: snippy_about_it
XOXOX

Forcing yourself to the front row, now that's discipline.

Well, I was raised by a fighter pilot. ;^)

31 posted on 07/14/2005 10:31:13 AM PDT by w_over_w (A good fence is horse high, pig tight and bull strong.)
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To: bentfeather

Hi miss Feather


32 posted on 07/14/2005 11:05:13 AM PDT by Professional Engineer (Have YOU thanked a veteran today?)
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To: SAMWolf

I'm in!


33 posted on 07/14/2005 11:07:55 AM PDT by Darksheare (Hey troll, Sith happens.)
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To: snippy_about_it

Howdy ma'am


34 posted on 07/14/2005 11:11:26 AM PDT by Professional Engineer (Have YOU thanked a veteran today?)
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To: SAMWolf

Hiya Sam


35 posted on 07/14/2005 11:11:50 AM PDT by Professional Engineer (Have YOU thanked a veteran today?)
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To: Professional Engineer

Like the Flag-O-Gram today :-)


36 posted on 07/14/2005 11:27:15 AM PDT by SAMWolf (Why is there a permanent press setting on an iron?)
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To: snippy_about_it

Going pretty good.. We lost 2 candidates today they couldn't get enough signatures.

My opponents haven't dropped out yet.
I already knocked out 2, 2 more to go.. : )


37 posted on 07/14/2005 11:42:44 AM PDT by The Mayor ( Pray as if everything depends on God; work as if everything depends on you.)
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Comment #38 Removed by Moderator

To: Darksheare
Hiya Darksheare. Play with any fun trolls lately?
39 posted on 07/14/2005 12:08:29 PM PDT by colorado tanker (The People Have Spoken)
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To: colorado tanker

Well, saw one.
But he went 'sparko' before I could beat him up and take his lunch money.


40 posted on 07/14/2005 12:09:57 PM PDT by Darksheare (Hey troll, Sith happens.)
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