For those who really enjoy digging into the actual documents of history, the National Archives has digitized a number of its records related to the Zimmermann Telegram.
https://catalog.archives.gov/searchq=%22zimmermann%20telegram%22
For those who really enjoy digging into the actual documents of history, the National Archives has digitized a number of its records related to the Zimmermann Telegram.
https://catalog.archives.gov/searchq=%22zimmermann%20telegram%22