A secretive intelligence organization under the British called Room 40 was responsible for the decrypting the zimmermann telegram.
The Zimmermann Telegram refers to a secret communication that proposes a military alliance between Germany and Mexico to fight against United States if its enters World War I against Germany.
The alliance communication was intercepted and decrypted by the British Room 40.
The Room 40 was a secretive British intelligence whose main task was to intercept and decrypt the German wireless and telegraph messages
Read more about Zimmermann Telegram here
brainly.com/question/2479802
