I’ve learned so much about Bletchley Park, but how successful were the Axis powers in reading the Allies codes?? Thank you!!
Heya vi76. Welcome to the circus!
The Germans (and Italians, and Japanese) put a lot of effort into breaking Allied codes. They had a lot of short-term success in tactical situations (that done by radio.) Everybody did “traffic analysis” – not decoding messages, but noting where they came from, and how many there were. The Allies were better at changing code books regularly.
Note that the Allies had no success whatsoever with Enigma if it the traffic was sent by land lines. If you can’t intercept it, you can’t decode it.
Hope this helps!