Deciphering of Zimmermann message

Date: 2 March 1917 Reference: HW 3/179 Creator: Records created or inherited by Government Communications Headquarters (GCHQ) Catalogue context: US diplomatic telegrams between London and Washington related to Zimmerman message and entry of US into First World War. Transferred from HW 7/12 in August 1995 Categories: First World War Subjects: Communications; Conflict; Intelligence; International; Operations, battles and campaigns; Personal and family papers Topics: Arts and culture; Family and identity; International trade and affairs; Military and war Period: Early 20th Century Copyright information: Copyright clearance for publication is not required, except in the case of documents in third-party copyright. Usage terms: https://www.nationalarchives.gov.uk/documents/information-management/use-of-tna-materials.pdf