DOCID: 3978305

Declassified and approved for release by NSA on 06-12-2012 pursuantto E .0. 1352a r-... --.

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YiAR DEP AR'fl!ENT OFFICE OF THE CHIEF OF STAFF

WASHINGTON, 25, D.C.

Jjif ;~BQSl - Ht TftA llEJWRANDW FOR ADillRAL Y.IliG:

SU-bJECT: Signal Intelligence

18 August 1945

-r.ith the termination of hostilities reduction in Army and Navy signal intelligence activities is indicated, as practically all Japanese Ar:o.y, 1;ayy, Air and shipping coded co:m:lwrl.cations l'dll cease much as all German coded communications terminated at the end of the German war. tinited States Navy and i.rmy signal intelligence agreemeHts· and cor:-..,..i tments v.ith the British and any other Allies, as well as with the Federal Bureau of Investigation, Office of Strategic Services, 'Ireasury and the Federal Co;rununications Commission, will require reex.aci.nation and readjustment in the light of the post-hostilities situation.

The i.ar Department is in a position to continue to meet fully the requirements of the President, state Department, Navy and r;ar Department in the Diplomatic field as provided under present agree:::.ents.

On 10 l'.arch 1945 we created the Army-Navy Co.:nmunications Intelligence Board to study and make recommendations to us on all :natters pertaining to coordination of plans and operations of the con:munication intelligence organizations of the Army and J;avy, to for.mul.ate joint agree.:ients as to procedures pertinent thereto and to negotiate and coordinate 'Id th other intelligence organizations. I believe we should now direct JJiCIB to examine the above questions as e matter of urgency and make aFpropriate recommendations as to any action ~e must consider necessary. If you concur, I believe ''e might well ask the 3oard to exa:ni.ne and. rake reco.mI:lendations as to the advisability of COffibin.ing ;.r;;zy and Navy intercept and crypt­analytic activities under appropriate joint direction or if this should be i.rr.possible for any reason, to recomrn.end procedure to insure complete integration.

Copy for: General Bissell General Corder:nan General Clark~""':<~~,--.· '· ··· J..d..:rd.ral Redmn captain ~enger

/S/ G. c·. Uarshall Chief o! Stai!

Lt. Cor..norton, Secretariat J~:CIB Captain Srnedberg

DOCID: 3978305

•

18 August 1945

~1th the t~t1on of ho1tlllti~• reduction 1~ J.:r1::¥ E.:.d gaTy elp:ial 1nt~ll~ence act1T1t1es la 1nd1cated, es -i:ra..ct1~ all Jn-panes• Arry, llA\'71 1.1..r and lh1VP1n~ coded com::mmicatic:.1 v1U CeAB• aucb &I all·Gen::JIU1 coded COmimll.lcation• t"1"1l~te! !.\ \he end of the Oera.n var. Unlted. St.a\es liA.V7 and "-R7 11.~ ln\elllgfl.nce a.gr•menh e.nd ~1tmenh v1th the ~ritlah. ~:. ~ other Allies, e.c vell a1 Yi th the 1eder&l Ja.rqu of InTe-rt4,..~ti.:l.-:, Office of Strat•~c SerTicee, l!'r.atury and th9 Federal C~ic~tion1 Comluion, v1ll require re1DJaination and read.Juatmt:n\ !..:: C:e 11.r'.ht ot the 1>01\-hoaUllUee 1itu&Uou.

Th• War DPW.rtaent h u a po11Uon to contblue to ft'et ful.17 the requl.rumtl of the Pred4ent, State Ilel)8l'taen.t, laTJ" 1-: ¥:a.r Deu.rtment ln the Dllllom.t1c field.. as woTlded unda wtt~t agree=ents.

Cn 10 March 1945 Yt C!"eated the At1D7-Xa~ Commnlcaticu In t@ll11:ence Bo~ \o •tud7 e.nd aake reco-tmd&Uon1 t(t u c:. a.1.l iaaUen i:tertl'.1n~ to coorC.lnAtlon of i>lan1 and o-penUo.:.r c~ t.:.• com:unicet1on 1ntell1e-ence orgnn1ut10Jls of the Arrq nd tLV7• \.e form.late Joint ae:reem@nh as \c -procedures ~tiJlent thae~ c:.4. to ne~otlate and coor.11c.ate vlth othfor intelli&ence orgz...:U:sUc:1. I believ~ ve sheuld nOY d1r~et. JJ.iCIB to 8%1'.ll11ne t.be ftOoT'tl rnHt.!na ae a catter or ur~enq ttd. :mnn 11-ppronri&te recoBCend:itlor...s LS to s.n:r action ve mst collti~er n~•HJ!r7. lt 7oa. concur, I ~..l.it'Te Yft r:lr..ht Yell eik: the ?.oarc to exs:tne and cake recomien!.& tie:.1 u ~o the a.d.Th~bllit7 o! eola'blnl.nc An:zy cr.d N:.V7 intercept cc ~t­ttn.alytle ~c:tiTl ties undP...r ar...ropr1ate Joint d.lrection or 1! &..!it.a should be l~ssible for ~ reaacn, to r'eoliit:l;e:l.d. procee:irt \.o 1ntntl't" ComrlEte 11:.ter;re:tion.

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Chlttf of Staff

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