Jump to content

Ultra decrypts


Recommended Posts

Hi folks

Noodling around for some references, I came across this:

http://discovery.nationalarchives.gov.uk/SearchUI/browse/C42149?v=h

It's the top level directory entry of the main Ultra messages sent out to commands during WWII. Which is kinda useful. Unfortunately they aren't terribly well indexed, so finding a particular message, or even messages from a particular period, will be hit and miss. However, all the DEFE/3/xxx entries I've looked at have the messages available as free PDF downloads.

For example, all the ORANGE LEONARD messages sent to Freyberg on Crete can be had on 41 PDF'd pages here:

http://discovery.nationalarchives.gov.uk/SearchUI/Details?uri=C1910791

Link to comment
Share on other sites

What an outstanding man Freyberg was. I was just reading some of his WW1 exploits mentioned incidentally in :

Ian Fleming's Commandos: The Story of 30 Assault Unit in WWII

A good read but not as excellent as "Churchills Wizard"s.

PS. I am going to have to go up there one day and get the hang of the place. And justcouple spring to the eye ..

WO 291/874 AFV armour distribution: comparison between panther and centurion under heavy attack

WO 291/381 Firing tests for tank gunners

Link to comment
Share on other sites

DEFE-3-900 contains the daily summarys sent from Britain to Washington (so called "Sunsets", presumably because they were sent at about sunset each day) over the period from 09 May - 21 Jul 1944. The dailies appear to summarise the main points of various decrypts over the previous 24 hours, and address the three main European fronts.

DEFE-3-900 is interesting in that they suggest the German response to D-Day was faster than generally believed (i.e., units were in motion long before Hitler was supposedly awoken from his nap), and also because they confirm the impact that the Fortitude deception operation was continuing to have post-D-Day.

Link to comment
Share on other sites

I found an index that should make looking for files relating to a particular battle a lot easier:

Series Prefix : Date of Currency : DEFE 3 Serial Numbers

OL : 14-3-41 to 19-11-41 : DEFE 3/686-690, 892, 894

KOT: Mar-41 to 23-4-41 : DEFE 3/891

MK : 20-11-41 to 23-07-42 : DEFE 3/745-764

MKA : 23-07-42 to 25-08-42 : DEFE 3/766-771

QT : 25-08-42 to 31-12-42 : DEFE 3/772-791

PK : 04-11-42 to 25-11-42 : DEFE 3/897

VM : 31-12-42 to 21-04-43 : DEFE 3/792-811

ML : 21-04-43 to 05-08-43 : DEFE 3/812-831

JP : 05-08-43 to 18-11-43 : DEFE 3/871-890

VL : 18-11-43 to 01-04-44 : DEFE 3/5-19, 129-152, 765

KV : 01-04-44 to 28-06-44 : DEFE 3/35-47, 153-159

XL : 29-06-44 to 13-09-44 : DEFE 3/48-65, 112-128, 220-224

HP : 13-09-44 to 21-12-44 : DEFE 3/225-244, 300-319

BT : 21-12-44 to 09-04-45 : DEFE 3/320-331, 500-520, 561-564, 599-601

KO : 09-04-45 to 15-05-45 : DEFE 3/565-573

So if, for example, you're looking for decrypts relating to Op MARKET-GARDEN (17-09-44 to 25-09-44, with buildup starting some days earlier), you'd be looking for the XL series, which are to be found in the DEFE 3 files 48-65, 112-128, 220-224 (probably 220-224?), and the HP series in 3/225-244, 300-319 (most probably 225-244?).

Hopefully that'll help cut down any searches for useful material quite a bit.

Jon

Edit: the table is from Hinsley's British Intelligence in the Second World War, vol 3, part 2.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...