▁Dr ▁Page ▁and ▁exposed ▁by ▁the ▁President ." ▁Since ▁many ▁of ▁the ▁secret ▁documents ▁in ▁this ▁incident ▁had ▁been ▁destroyed , ▁it ▁had ▁previously ▁been ▁assumed ▁that ▁the ▁original ▁typed ▁" dec rypt " ▁was ▁gone ▁forever . ▁However , ▁after ▁the ▁discovery ▁of ▁this ▁document , ▁the ▁G CH Q ▁official ▁historian ▁said : ▁" I ▁believe ▁that ▁this ▁is ▁indeed ▁the ▁same ▁document ▁that ▁B alf our ▁handed ▁to ▁Page ." ▁ ▁See ▁also ▁ ▁American ▁entry ▁into ▁World ▁War ▁I ▁Imperial ▁German ▁plans ▁for ▁the ▁invasion ▁of ▁the ▁United ▁States ▁Mexico ▁in ▁World ▁War ▁I ▁ ▁References ▁ ▁S ources ▁ ▁; ▁ 3 5 pp ▁ ▁Further ▁reading ▁ ▁External ▁links ▁ ▁Failed ▁Diplom acy : ▁the ▁Z imm ermann ▁Tele gram ▁Our ▁Document s ▁– ▁Z imm ermann ▁Tele gram ▁( 1 9 1 7 ) ▁German N aval W ar fare . info , ▁Some ▁Original ▁Document s ▁from ▁the ▁British ▁Admir alty , ▁Room ▁ 4 0 , ▁regarding ▁the ▁Z imm ermann - / M ex ico ▁Tele gram : ▁Phot oc op ies ▁from ▁The ▁National ▁Archives , ▁K ew , ▁Richmond , ▁UK . ▁Mov ing ▁out ▁of ▁German ▁Emb ass y ▁after ▁breaking ▁relations , ▁ 1 9 1 7 ▁Z imm ermann ▁Tele gram : ▁The ▁Original ▁Document , ▁accessed ▁ 2 1 ▁Feb ▁ 2 0 1 5 ▁ ▁Category : Un ited ▁States ▁documents ▁Category : History ▁of ▁crypt ography ▁Category : T ele gram s ▁Category : World