KnowraZimmermann TelegramLinked fromLinked fromThe 7 pages that link to Zimmermann Telegram, each with the reason it gives.All 7Broader topic 2Related 4Compared with 1Signals intelligenceBroader topic: British interception and decryption helped bring the message into public view.Fourteen PointsRelated: Its publication helped shift U.S. opinion toward entering the war before Wilson proposed his peace program.Unrestricted submarine warfareRelated: Its revelation compounded American anger after Germany resumed unrestricted attacks.Casus belliRelated: Its publication helped shift U.S. public opinion toward entering war against Germany.Hiroshi ŌshimaCompared with: Like Ōshima’s dispatches, it shows how intercepted diplomatic messages could influence wartime decisions.History of cryptographyBroader topic: British cryptanalysis of the telegram helped bring the United States closer to entering World War I.Sinking of RMS LusitaniaRelated: Alongside renewed unrestricted submarine warfare, it helped bring the United States into the war.