report of the joint committee on the pearl ......ref id:a67551 report of the jonrr committee on the...
TRANSCRIPT
![Page 1: REPORT OF THE JOINT COMMITTEE ON THE PEARL ......REF ID:A67551 REPORT OF THE Jonrr COMMITTEE ON THE INVESTIGATIOll OF THE PEARL HARBOR ATTACK Page 2.32: "The smcess achieved in reading](https://reader035.vdocuments.net/reader035/viewer/2022071416/611400cb2de23d3ad56ecd9e/html5/thumbnails/1.jpg)
REF ID:A67551
REPORT OF THE Jonrr COMMITTEE ON THE INVESTIGATIOll OF THE PEARL HARBOR ATTACK
Page 2.32:
"The smcess achieved in reading ~~!1e Japanese diplomatic codes merits the highest commendation and all witnessess familiar with Magic material throughout; the war have testified that it contributed enormously to the defeat of the enemy, gt"eatly shortened the war, and saved many thousands of live&:"
Declassified and approved for release by NSA on 11-22-2013 pursuant to E .0. 1352a
![Page 2: REPORT OF THE JOINT COMMITTEE ON THE PEARL ......REF ID:A67551 REPORT OF THE Jonrr COMMITTEE ON THE INVESTIGATIOll OF THE PEARL HARBOR ATTACK Page 2.32: "The smcess achieved in reading](https://reader035.vdocuments.net/reader035/viewer/2022071416/611400cb2de23d3ad56ecd9e/html5/thumbnails/2.jpg)
e 9 T~ a,.ot&oul.&r auco••••• ot tbe •ignal 1nte111a.no. aer
rt•" ot tb• AJ'IQ' &Ad th• .. YJ' throqhOtat World War II ha•• b••n •utt1e1ently publ1o1••4 4\U'in& th• .ar1ou1 1n•••t1g&t1on•
ot t.h• oaua•• ot t.be a111t&J7 d1aaater w 1utt•Hd in th• •v-
· p~1•• Japan••• attack on P•••l Barbor to require no det&114td
elaboHtion on rq _,.~ betor• tbia e~tt••· It ia eerta1nl7
aor• tban poaaibl• th*\ tbe final reault ot tb• war aight have
been ••l'J' ditterent w• tor the 1ntor•t1oa t\U'll.1.abed our h11h C.0-..Vu.'-",..._....._,__c.A.~~,, ( Q o t./\ • "" T)
oow.nd bf Anq and l&VJ' •ic-1 1ntell1gea<se,_aerv1o••· BJ tb&t
atateunt I don't aeaa to indicate that •• .Ught bave loat the
var. 1"at that it 11ight baT• been •o long drawn out •• to bav•
b•c~ 11'1 •ttect. • 1t&l._te. Thi• muoh. bowner, I do Jmovs Yvva(.rl ~~~~j~~ • ,_a
,._ Ill' th• officer 111 cb&._. ot opeiiat1ona oil General ll&oh'tbu,r '• .
"'sw.tt· throughout th• war 1D the Pac1t1c_,~i·.;. ~·-;. ~~,~\.N<~I IJ1 ~ ~ ~ ~ .. ·~ lq4; IJ,~ 1 .COM1N\ ~~~
\1 ~ etat~tbat the 1ntol'iiiiion~e1ved trOil tltt:•, b\•11':1•..-·pe~
~tb&tt~;t~•l••• ..: •• d-.. •nJ' tltouaaad• ot 11••• .ad :hor.ten•d th• -~~ no l••• 'ban tv.o 7eara. Let ua lea Ye aa1~ .. the ·
MttW' ot Vbat tb1• ••Ying ot 11••• and pr•••nttng the •1•ing
ot aeftMl hund:r•d thouaand ot our 10\1DC 8en ll9&a1a to ttte VIJ.1.ted
Stat•• 1n terma ot .. npoyer, tor auch a&Yinga oa11 b&rdly be •Y&•
~uated. 1n term• of 110ne7. Le\ ua con11deJ- onl7 vb&t the t1nan•
o1t.l·a-.1qa &llO'Ull'i-4 to, b'J abortenin& th•¥&!' b7 two ,_al"a. · &MINI.
In 1~5 and 1946 we a)eDt tor tb• knlJ'• •1 ... 1 &a••ll.i1•••
act1v1t1•• alon• &; \otal ot a little oT•r Jt8 111ll10Jl doll&rlJ
th• l&V7'• .. .,..1 iid•llts•••• ettoPt vaa appi-ox111atel7 tbe ..,..
as th• A~·· in extent .a.o. coat, ao tbat both 1erv1oe1 coat
![Page 3: REPORT OF THE JOINT COMMITTEE ON THE PEARL ......REF ID:A67551 REPORT OF THE Jonrr COMMITTEE ON THE INVESTIGATIOll OF THE PEARL HARBOR ATTACK Page 2.32: "The smcess achieved in reading](https://reader035.vdocuments.net/reader035/viewer/2022071416/611400cb2de23d3ad56ecd9e/html5/thumbnails/3.jpg)
REF ID:A6751j •B,.,. I ,;_~~
. .-f:'.'t.do:'~lli• dollar• tor the tvo 1••r•. BoW ·to• the>•• .... , .
,•
· :·two rear• ' open ttou ot. the I.rm, and tb• xa.,- ta•· CoDSN••
appropJ'1&\e4 a lit\1• l•••·tbaft 31 billion d.ollare. Simple
ar1~bllet1c tell• wa tbat bJ •P•n41•8 100. m1111oa a.ad ahorten-, .
· · · lag tb• war b7 two 7ea:ra. ve •••4 31 b1111oa. In otl:Mt• Vorda. · . &M1N"r
•pendJ.ag oal7 a rela,1••17 ... 11 aJIOunt of 110a.7 tor .t1111 '-•
. tai'la•••• act1•1t1•• r•••lta in a verr auob gi-ea'•r 1&w1ng
'baa &D:Jbod7 could ever u\1o1pat.·-th• ratio 1• around 500 to
to talk about Yb&t •1Pl
• rea1oaa •1 aot be 1oua. QD 'I.I\ l N--r- . . .
It •ipal ~t•lliaeno• t.• aa ackMV'l•cll-4 •••eattal to
. v1oto17 1n var•t.i..e# it 1• .-w• ••• •••e\t.al 1a ~·•·time.
V1tb the t:P ... Dd.oU'reduction 1B our ar.4.atr~;airlc• th•
... ot hoat111t1•• ibere ... ,· ot oov••~ al•o· .~ ..... ••l'J' ill-- ., .
·bet• a oetala poiat ve Gd cut on.17 at ...-t.l'a&ard to our.
aat~ooal •Mur1t7. In tao'# &a th• •1•• of ov Utaed toro•• , .
4•~•••, our •~pl 1n••llqeaoe poten:t1•1 n•• 1acreaae. ~ ·'. . 19'f-b , ;i. ~tu •••• Deo .. bel'f\_. Bou•• 11111tar,. Artair• Ooimitt•• released
.•A ••JO•t on tbe q-•~• o...._\17 eaplo7ed 1D. tbe collect1oa, , . .
••1•\ion.. and ti••am•tion. of 1ntel11tenoe atttot1ng tbe var '.
R- •a.ti&l ot the Uai_\ed. ..St&H.ar..!?~te·epena with UMt tollowuag
\
• • ai:"!•lR · ' '1.-.'~.pn · :.· ;" " - •.' 1 ! .1. "' ·-:::.r-i .. ,.... • A ' .... ; ~ ' pb.1 , " &.;; V'4 ,.. '<t •• .,. ; - t....... ...- ,-...., " ~-.::... U'l.' ~ "
; tl.. ... "pa; '~~( ...... ,,.,. ,.... '..-·/ £. '1"l"':'"f"~ ~ •• ~··'it" , .•• -· .._, ! ' .•• ..-.C'.'. :; e: '<Ii'::'.":-::-~--::~
tt:;::~;~;J.t1~ ~ Wo.'l..,~4.J!~tt._~A.-,-=---~-- _ . LJ ,. ~~ ·. ~No,t"&o. -u~, ':\.~~. ~
' " : ~'
![Page 4: REPORT OF THE JOINT COMMITTEE ON THE PEARL ......REF ID:A67551 REPORT OF THE Jonrr COMMITTEE ON THE INVESTIGATIOll OF THE PEARL HARBOR ATTACK Page 2.32: "The smcess achieved in reading](https://reader035.vdocuments.net/reader035/viewer/2022071416/611400cb2de23d3ad56ecd9e/html5/thumbnails/4.jpg)
"zat tiM ot wu, 1atell1g•ac•--tbat 1•, 1D noa• .... -.obat..;;1 hNa, MU.bl• 1Ato!'M,10ll .oa th• 1treng'11 , .
&ad ...im• .. ••, •• O&J*.bil1t1ea, pl&U an.4 act1.-01: toH1P, ~·18 &11 &ola\oYledpcl eaa91lt1&1 to T1ot•7• Ia tS. ot peace, 11lt•lltg.ace 1•·•t1•ll7 -••Ma•tal t~-•• PH••rTation ot 'bat ~o•, and tor th• pnv•U• ot at111 uotlMu• YU*.• ' ' ~, .
"
!b• ti-.port thea lo•• On to &t•• reason• to?" it• 1na1atenoe cm
'h9 .-.O•••i\7 tor 1atell1.-.0• work. 1n peace•tiae. !be tirat
part.or th• report .U.a with th• tollovlng •1ga1t1oaat euaaaar1-
s&t1oa:
"The point 1• illpo:rtant: we oanao' oo.n.taue to U•• aud breat.U th• as.. ot tre ... n vt,b.Clut.•<leca•t• 1At•l.11geaa•J &ad 1al•ll1g•no•·. of' 1t••ll', ao •tter bov pod it ie,, 1•·aot •MMbJ '\'be cold taot• ba•• to be lllldentood an.4 uaed.•
T~ ll&jortt7 Report ot tbe loi».t Oonai-e••1911&1 Collll1tte• on
the Ia• .. t1gat1oa ot tbe Peai-1 Barbor A\taok ba•.111ia7 ..rer.aoea
to ':a.. iaport.aoe of 1n'•ll1geao• 1a ,.ace-tiae. ~or exaapl•:
"Bt't1o1ea.t 1ate111a-..e ••r•1oea are ju1t aa ••••nt1&1 111 tiae ot peace u 1n. var, and th1• t>r&aoh or our &1'1194 ••rYio•• ..-t al,,..J• b• acoorded the iaportant role Vbtoh 1\ d.e••r•••··
•1evertb•l•••, th...-.1. aubataat1&1.bl.~1•, ti-om a r••l•• ot ~~ P~l Bar~ 1a••••1a&,1oa. 1a ~ta ••u•t7, \o corao;lll4• that ., •• tti. MOuit7 ot the ·Ja~• Mil be w .... 4 oa1r· ...... ••'11l•1t7 or ••r• .,., aad on.ball•\.toa ot Hapoaa1b111tJ 1a tho••
· .,._,. ... •1th D&ad.1111& ia\•lltauo•. • ·
'ef~lo\IA ae:cr.r...,i, .. }._ 't6EVICA
H i;;· ';/ D e·, n 'v" ~ .1. E: 1:S a •' ' ----.IEDl!~n
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. "Ua4• P"••t world co.D41f;1$8. tll• A&tioiaal at ... • Ylll autter al••• \he VD1•-4 ltat.ea ba.a • mor• •tr1o1•a• 1a\ell1geo• •1-11 111b~111l1~ aA4 -Sl1tU'f tielda, tbaa,,. ba4 Wore Vot-14.VIU' II. Eaovl..,. or 111Mnatio-.l. •o~o, »o11t1oal, and aoci.1 coa41'\1ou 1• a•o•••1'7 1t lftD4 41plo· •tic deo1•1oa• ue.'9 ~ •4•. l'urt:.b.el'llOre, data obtaillff b7 u taMlllgeac• nn1o~ oan a.a11at 1D otenain1q \be •1•• u4 ob¬•• ot th• a..-4 . taro• to be •1at&1a•d tor tbe deta.ae ot ov ll&t1oa. '!he ee-.b11•...._\ ot a •~rlor 1a\ell1geace org&aS.~ u.tion 1• ae04 • ...., ••
. lov non• ot •••• :repo,rta NJ' ao, but I aa ill a poait~on
to atti ... tbat Vbil• 1atUto91tt1Dg Ud aolvlna ••oret ••1&ge• 1• OJ117 oa• ot..,. •OOH•• ot aa4.w7a to aoQuire 1Dto:r.at1on
' abft• tOHip •UOJl&.1 tbat Mthod 11 bJ tar the llOa\ iaportant
&D4 Y&l•ble. And "' 1• auper1ott two •ll th• otlutr• 1n a\ leaat
tnro· ••J!J 1llp0rt&at ...,.ta:
(1) In~·••• ot a torelgat aatloa. ba•in.g l'1&1d c•n
•or•b1P aa4 atJtODg s.a~l aeour1t7 1t can vell be t.be major ' .
or •.-. tu oal7 appUoabl• ••hod ot &04ua1Dg 1ator11&t1on.
(2) While tlae' o\he •tbode ·-~· 1atonlat1on about.
.' ~ tu-•• -.i1on •a ao\iOaul, a.act ••ldOll (uo•pt ia41Hctl7) at>nt
·1u J.at.•••1one •D.4 plaU, •ipal 1•~•111.-c•• vb .. aoat etteo-
. u••·~ 1• oapabl• or p191'1tiq 41"ot &ll4 oat•aorioal ev14ao• or ~ . ~ . ~
-',,_.,:the tars•\ ••1••• 1•4•r• are taaiatt.aa al.me•• 011• tb.•J ' ~ ' ' ..
. . ~ \billkiag it.
Su• it 1• aot ~· b41e•ua• •1111&11itel11senoe·~~,..,1on• ,_ .
·.:: - ...
![Page 6: REPORT OF THE JOINT COMMITTEE ON THE PEARL ......REF ID:A67551 REPORT OF THE Jonrr COMMITTEE ON THE INVESTIGATIOll OF THE PEARL HARBOR ATTACK Page 2.32: "The smcess achieved in reading](https://reader035.vdocuments.net/reader035/viewer/2022071416/611400cb2de23d3ad56ecd9e/html5/thumbnails/6.jpg)
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, , "'"' .... ~·· Yld.ola ... " •-M.••4 UDC»Jt -· -.4 .. : ~ • > I ,' < t ' .<,"
ag ot t•9bl''l!l ·•••USU•; !b• ·¥>.-.-• &Dd. uae&a1q 'oa•
plex1t1•• in ••PO&• a.a o~tioraal teobaiu•• 4v1D& tbe
reoeat. var 1••r• bad. U.1• to'Gt•l'J*ri• la th• •PJ*ft.\U aa4
aetho4• ot atpal 1Dt.ell1&•o• &ad •omaun10&tioa aecu1t7-• Ve
••'•eel 'the YU wttb a ._., .. 11 groQ ot people. •XJ>Rieao•d
1Jl eo1¥111g,, b7 .. , &H \MaJ NtbeP IUrple Mthoda &ad •elaJ.neJ17,,
oe'8.1a 1 ... 1p. cowmasoa•iona. Ve en4M th• vu v1t.ll a vell
ba~ t•o• ot o•w 1010oo an ad vo•n, who v1tll l:dshl1 ' '
,, '
dova·.,...,1-.111 all '1ltt.o.-.ioatiou of ov --1•• an4,
aoreover, the•• co111mt••i•• bad. b•ea •ubJ•ot-4 to ooutan'
iapl'ov ... rita on• tb9 ,....-.. Oae ot the ••t ~tal taotora 1a
ov euoo••• •• the tao\ tba' •• ov •--1•• ,.oP'••••4 1a •kine th1D1• aol'e o~li~\ed oe aol•t1on •xi>91t\• •de pa.r&ll•l pro
ar••• and tmaa.ffre able k keep up Y1th tllea. Ve •mtaUu.ct tecbn1oal o•t~n11it7, la o\be» word.1. It 1• a .. 1l-••\abl1eis.4
and ff'FJ imporU.D.t tao' ••• 11 tb.e oppoaina OPJPtan&l.71ta oaa
k••P 1A atep w1\b. th• a.oo•••1•• &a.d pJ"o..-••1¥e increa•••.1.n
.eoaplait7 1a tu ood•• aad. o1pbW• t"MJ" are· at."'411.na thq eaa,, •• • ftl•, r-4 \lie nw 97•~- •lao•t •• tat1J .. tb•7 are Jnl\
ta'o 11a&1•1 11. oa tll• oU.r bU.4, 'bne 1• ..ta ot a lag, t.b.e
•UllJ 017pM>papbera 1•t tM ft• &bead lor tb• •.l'J'Ptu&1"~ to
oa\oh Q t'tliok.lr u4 1a aoae -. ... 4*Mh1Da Q becoaea iap:MO'ic•
&bl.• or ~•ibl~.. 'Ill• aaalog or ge1itSiaa .lo•\ 1n a pitch-dark
o&•fta i• appUcattil•a 1t JOU ..,_. lo•• \bit U.•4 which ooameota · N.'"feH1'1~.i.ct1 s~· o· c·
![Page 7: REPORT OF THE JOINT COMMITTEE ON THE PEARL ......REF ID:A67551 REPORT OF THE Jonrr COMMITTEE ON THE INVESTIGATIOll OF THE PEARL HARBOR ATTACK Page 2.32: "The smcess achieved in reading](https://reader035.vdocuments.net/reader035/viewer/2022071416/611400cb2de23d3ad56ecd9e/html5/thumbnails/7.jpg)
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1e·~ · e a REF ID:A67551e A ft5ion~~~i~: m---... f'.IG'P- ~ 0 -.; -.. 1 , r r.1~,,.1.1 ~( ... ~, ~ .. ~ •• , rl.:a~ µ., ·jr·. '.,,,,, i"'i..''
~. • 8E • ; '.r>71 H'1'1 j
\hi~~;~••H•ioa I •:t~~.I' r ..,,~r~F~oua cOM•41llW•• o~J.;fj;J.; laek··ot teobaloal. o•'.ta.it<if~i,..iild'i~•• t• ett.ot1Y• l~::.>,-~~.· o)MtN t1oa 11•••41.!Mk "PO• th• ou.tbHH ot ·a.at111t1•• ..,.. no·
vll*• llOH ole&l'lJ'' 4-outrated tban. 1n the caae ot tbe Ja.paaea•
Dar b1gb-•oh•lon ·.-..-., c--1.cat1ou. It 1• a tact tbat
tv1na tbe entire pw1o4 tr• 1 »ecembff 19'1 to the awmer ot
194,, ·•• <Souldn•t J!lia4 !II. ot the•• oc 1 '8Dtoat1ona. Bad tbia ''
been.othen1••, the 111U~ •1t•t1oa 111pt have been 4u1t•
41tt•••nt. To dtt48• pvelJ' bf tM 41••,roua ettect •bat \be
•olut1ona obtaiMd bf• att9r tbe autum ot 194' had v.pon.,J&paaeae
opwa.•1ou, it 1• leptiaate to Ud.Dk that th• impcrtant •rl7
Japaae•• peaetrat1ou to ~· aoutb 111&b• 11&•• •t .•1tla p-eatw
obatacl•• and that aa a "91llt th• •r in tlae Pac1t1c aigbt ba•• b••• ttlftl1A&ted Mll7 ~tb• earlier. It aa adeqaa'• atat.t ot
Cl"J'Ptuaal1•t. bad been -ged ta •W471ag Japaaeae Artq tratt1c
con't1auov.91J .troll 19,t. WMll tbe •1•t. ... v•r• aolY&bl• with c•iarat1ve eaa•. complete ooat.1nait1 co\114 bav• b .. n •1At.a1ned
troll the Wl7 cnit.••t·ot \be var. Bllt. _..ct1oall7 all tbe crnt•
a.nal7ata-we had a• tba\ "1 .. ·-aJMl we bad oalJ' abou\ 20--vve
aaatgUd to work oa ''-· •olu'tioa ot 41pl0..t1o trattio. A.t't•l'
19'9 tb4t a7at.w .._.,._ _.. d1ft1oult but •••r aon 41tf1nlt
tball th8J' vere 1D 19'5 wtaea, beo&11ff ot the poaaeaa1oa ot a back•
poacl ~ Jmovl•4- ,~, 4t;Spett1•AC• bu.11 t tna a'Qeoeaat>ul reacU.q·
ot ea.lier period•, tl:leJ'.~re ao1Te4.
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ta 1DHl'o8pt YOl'k1 , ....... ,the basic MY _._.J.al DO lt11dJ.ea ' ' . ' ~ \.'
6 ••
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. ' -- REF ID:A6755a
BfmtT • •• a\ •1i.-. be •---••4·oa actiaal tratt1o aD.4 pur•lr ~•onttoal
~ ' ~ ~
•~Ut- •7 ".tw: t>tt ~ rMl taz.get·a1topth9r, nc> •tter bow . . •'
~uoo•••1111. C0ats.Autt7 1Jl atercept vork llMaa, ot courae, tbat
~ ~eat and~ peraoJUMal •• . .--:\be itltel'Cept aervio• bav• to be ~-'
•1ata1ned. ·t.ba\ the 1.lltffc•Pt equtpaent. an.cl teobD.1que• auat tMJ
kept abrea•t ot new ratio ti-anllldaa1on ~•cbn1quea and tbt.t th••• are a,,_11able.a\ tbe outbffak ot RP, tor 1med1ate, uaehl vork •. . .
be Mat1oned1 &Jld ~t 1• •h• aeceaa.itJ tor conti:DU1t7 1n tl'&iD-
1&1&~ 'tbe aeceae1't7 tor •inU.tatDg • bS.ChlJ spec1al1Hd etatt
.PM-••1ng ••rt..,... •kill•~•~ prov1ctS.ac·tor oont1au1tJ' 1D
,,.J.m.ng ot ,. ...... 1 1n PMO'•·t~ 80 •• to b• •tteot1Ye 1Jl wr-. '
U. also 1• a M*4_pecultu to •taaal 1DS.ll1genoe. · Por 1t muat
be H&l1aed that ,-ou. oan•t find 017Pt&alal1•'8 1a co.-roe .. -.au
tactur9, or ind .. t.ry, •!ace CrJP~l7tte act1v1t1•• bave ao
oo\UlMl'PU't 111 oivil lite. TMr• .a.re no «:1v11 criptaaal7ata vbo, . \ '
~1-.4oetor•.or, cleat1at•, OQ·be tacl\'&Oted iDto IWY1c• and put
'• ......... " mci1oyc their P"t•••10A 1...diatel7. Th•l"•tore, on
·._- ,,.. ;~1),.•k ot, •i- \he" l• ao 1-ortaat JoVoe tHll Yhi.oh
-~, •spn1-.c•4 per-..•\ eaa be d:N• tor ~41ate uaetul
. a.... Aad •S..•· ek$.11 1a. •JtJPt&Ml7•1• can baP4J.7_ . .,. developed .,
·la· a ~J"t ti•..., orn>tanal1Uc ai~a o&p&ble· ot producing qu1ok
~··· OU DO' N _iaprorteed la a bUt-rf 1 olea9 there 11 a aut-, '
tio1--' auoleua ., auob ~aed &D4 esper1 ... •d per•onael no good ,, ~\I!- '
· .e~17tic o-1oa. :-~" M ooad.uot•4 1a th• -..1,. pba••• ' '-
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-------~-----------~--------REF ID~A67~ A
Btllf!r w.
obk1M~ aoat eaa11r aad. -- aueb reault• •r• ••-11 iJlpOJ't.aS. lloreo••r. it 1• a the upper •tr&ta ot crntual7U.c bJ-&1.Da •• ,
oont1DU1t7 111 1tlld1•• 1• llOS'\ 11\poJlt&nt. It 1• P•••1Dl•, 11Jl4ep
PM••v• to .obta1a large n11!1be•• ~t reerut.• of biib 1Dtel11gence
tl'Oll co11-.,a·&D4 11D1••r•1'1••1 but UDtil tA•J ba"4l ll&d ••._..1
1•n aot•l ~1ence aD.4 tn1ntnc tbe7 a:.e VhollJ ~pared ~ ~~ ' "' y,
to • .,.ck '!¥t aoH cUtti•ult '..-Obl- eacOllld ... d 1a ll04-1'1l, up
to-.da t• ••c"t ooau.ica•1••· JIDr•o•.,_, ~ ••l"J' d.ltttoult 01!7Pt&n&l7tio PJ'Oblema ot tb•••
da7• r9'11ir• lal'I• numb•J'!• of ak1lled peraonnel. It 1• not Mt•
tlcient to .-ate.in o~ t, -.11 nu.cleua ot auoh pera08Ml. Ve
did that ill·ille yeara 1-941&*-17.prior to 1Deceaber1941, ..a. I'•• alre&47 io14 7ou. Vbt.t tbat pol107 coet ua 111 reapeet to the
val": 1n: \b• .laottic, &ad.tho•• watortunate oonaequenc•• w1i.1 tM ' .
repeaie4 it we follow _. .... pol107 apin. It •111 --.n tb&t.
th• ou\J\lt ot a1pal utell1.pace doina tb.• earlJ etagea ot a
an w.r •111 aga1a be.,__., .. 11 u·4GaD.t1t7 and aot too 1mport:ari•
ia .-11i7. •lllff it •"14 be -.J.iPlJ' tbat ditticult orntograpb1o . . •1.•t- "OoVl4 be read b7 relat1Y•l1 aakilled. potonul. I' '6k••
a pe4 4-1 or time \o bu.S.14 up troa 90r&\ol!l a nn •:I.pal in·
t•ll~• ergaataat.101l '° tt.. po.1Jlt.¥M»• the outnt ta ot Y1tal
1~• :1.n both 4•1ttr ea4 ..-..utr. In &4d.1t.1on to the pnbl• or omt&nalJ'\ic t.M1a1na. tber.•'
1• tu~ or uatrdrac ta ta~ woi-k,, ·ror 1.nteroept opmt.tiou
a.ad 1•\•oept per•Olm9l ue b7 no ....a• De .... •• r&dlo, no•~ viag ' •' , '" .
![Page 10: REPORT OF THE JOINT COMMITTEE ON THE PEARL ......REF ID:A67551 REPORT OF THE Jonrr COMMITTEE ON THE INVESTIGATIOll OF THE PEARL HARBOR ATTACK Page 2.32: "The smcess achieved in reading](https://reader035.vdocuments.net/reader035/viewer/2022071416/611400cb2de23d3ad56ecd9e/html5/thumbnails/10.jpg)
,, "• .. REF ffM41ifl 5f 1 WJU.Vfte:J• ... e
%\ .~• .. tu or ••1D1ag to alt• &A o~ radio opgato• ' . .. .
;.q •t~t1ve 1a~\ oi-:rator1 &ad 1~ tu#• nota _tiae to
••'6bl1•b aa •tt•oU'Ye 1AM£O!J>\ atat.ia. Iltpl-O'f1a&t1on sw-
41•'-lJ betOPe laoat1l1t1•• 'Will •••ult 1a great 1n•ff1c1•no~ &ad,
yl:P\ \• aoet &uorH!!t. t.h• loa• ot 1a\ercept_•tn1al 9b.1ch
\l.h&ll7 •tt01'4a exeell•at •l•• to 'be 1oltaUoa of ttae .. .., •• •J-17 017Pt0p&]>h10 •1•\- &n4 oomnul1oatioll•· T•cba1cal
ooat.laui•r 1B Ol'JPt.&Da17•1• -.4 ill ia-..Oeptioa ~ iadilaolublf
e...-ete4 to eaoll ot.b.e~ aa4 both are ••aeJ.itlal tor •uco••• ill
._..- Be\ll MCU1" ooat1a\11tJ'·ot tn1Jdaa 1A peace-ti..
8o ta» l'•• tal.k414 •17 abo-.\ the uo .. a1t1 and iapol't&ace . . o'I teobaloal conta'OitJ aad. tn1ntng 1A •t&al int.•111 .... opt"~
t.iau duri.Dg ,..., •• ,,.., bu\ I ••t ao't oa1t at lea•• a retffeaoe
•o ;t•• abail•• ».eo•••~\J' aad iapoi-taac• 1Jl ca cic•Uoa ~1tf' "
o~-.ioae. Vbioh &1'9 ...... coaaeo\e4 with the prot90•1~ ot O\IP
cnra -._Ii I ltJa1a.t1-·-o9 Ol'J~PhJ', 1n. o•bff WOl'dl~ ... tWO
t~•lilt ot oJ7J>-.pap'tq aD4 ~7P~l.J'•1• u• ~117 one aad. th•
..... • OalJ' bJ kaovle4p M.d. _,..1•0• la b•-.kiDg down •••
oodlt• Uld o1plW1'"• clo •• le&ftl la«* to prOlfO' .._ .,.. ••••P•J &114 •• ~ bring iapl'O.,.....U 1a•o ov Oft cod•• •ad otph•r• ve le&Jlll tlat.,• of ,._, ~S\ 1a •ol•~ tb• ....,... Tb•.-
, - '
coa•:laUl7 1.a ..,,.._J.v'io &lad Ol'JP•opaJ>blo •W41•• toN ••
pttebl•· P1Mll7, -1• •1 a. uted tb&• coa,tni•r 1ll c.,.-ptanalr'1•
•t"41•• t>rU.• 111PH•-~'- ta ov ova Ol'JP'CCMJt1'1o 171tw aa4
•t.Mda• Yi~ Ybiob ft •7 M lulle4.b\o. &.f&l•• HU•~
••evi\7 aa4 ,..._1D bli••hllJ tpoMM of fta\. - tore1p
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. ,~. ·, ·~ , REF ID: A67 55~
• · Bl\!19' , .
~JU.o UM&• •7~.,_ 4o1DC •1th ou auppo•'4lJ aecnt :·~~~ti~ •• 1.-......... 1d t'*~ th•~, •• , ~-p tbat.
·. :, ·,OU b• clea~t to co 11-1~'i• ••celtJ ••k 1• 1011. ot ,opt1nu1tz • > • ~ ' " ..
' a cmu11ilii2 atuuu. to? .. 1• ..... ·\bat • •h'1ou blow ba•
been deli••re4 to t•oblt!!l •rt&•i!Ptl or both the C£1l!'°ll'!Rh1g
't;M oru'!Mlxtiq •!n&U• tor er-tin tatl&tUH• .lad Vb1le
l'• • U:a.1• pba•• I ~ 4'•11 J'OU \bat it •• ao aoo14eot that
ow , ... ,.... &act bi• .. ,....,. ot 111port&at otti41&la &ad ott1c•r•
co~l4:Mk• 'ota.a.•7• 1aa1t .... 7 vo\Uld t• eartb n.ot 01109 but aeveral . , . . \ 111.t• aa4 ••t w1 tb ao •aee14-ata • auch u Adlairal YP&llO\O •t.
. . •:lth.· ror ov c---1o&*i•• aeovit7 w.e a.cl9fl•te to th• U..n••
b•4•n plaeecl on 1t 4utna tb.e-vari our oipbo •cb.1ae•V•n
a.n4 *" •• .,. •• in tbtt vorl4 and v• maat ·n.p th• ao. In• \llOU8)l\tul lit\1• atud7 entitled Tb• IP1t\Ul'tt.9t ~riefa
Seoret Iniell~• b~ 1-ot•••o~ Pettee or .Allber•t Collea•,
. publ1abe4 l&•S. Ootobel" b7 the IntantJ.7 J'o\IJl'D&l Pre••, t.bv• 1•
a.a &Ml791a.ot oe ta"1t• aad error• 1il 1at.•llipll<M.betore
P-.rl Jlal'bor. Pe\tee l1att .. Yel"&l Vtaltaeaatta. "Tb9 tirat",
b.e ... ,.., ..._, ti. lack ot AIQ' iclea tba\ s..n.1111..Ce abould &1••
va~iq ot a ••Jl'1•• attaok betore a uol&ration or war." Aa to
Ud.•,., f, cu onl7 "to1at w trha\ th• 111.Jo•l.'J',leport ot ti. Jo~. 00DfP"•••10ll&l OOlll!littee .. 14c
![Page 12: REPORT OF THE JOINT COMMITTEE ON THE PEARL ......REF ID:A67551 REPORT OF THE Jonrr COMMITTEE ON THE INVESTIGATIOll OF THE PEARL HARBOR ATTACK Page 2.32: "The smcess achieved in reading](https://reader035.vdocuments.net/reader035/viewer/2022071416/611400cb2de23d3ad56ecd9e/html5/thumbnails/12.jpg)
A•• •\tn ot t&ol,.1, •• ao\ l&ok ot •18Ml 1nt,ell1&eao•
b•t • v•1a&••• in *M •• iria1oll •• •de ot 1 i ._, •tu.d• out
•• tb• pPiao1pal t&l< •. P••'4Ht ••1• '11a.,. •"'* ••oon.4 glartaa
veaJr:n•q •• \'M 1-•Jc ot .-1s.aa\1on Ua&t aoden S..1-llig•nc• 1a ~ o( ,
• big Job.• !'bl• ai>i>l1•• •o ·~ ... 1 1D'•111..-o• ••»eo1&ll7,
beoau• ca..• ue oll17·a .tn ,.•Pl• vtlo ar• 1Js • poa1t1a •o -4er
•taad •act to ••11a•·tM\ \Ile d&J'• YbeD. ooa.a •ad. otph•r• co1ll4
be aol-YM bJ' ia41•14•1 -..ru ••~ oa11 n~ pna11, pa,w,
&act 1.Jt\\11\J.• b&Y• d1M.-.ncl• 0..,.,._lJ81a Q.4.oJ'fPtOP'&Jfb7 ' "
Ila•• bee.. bil bu•iM•••• 04 :bip.17 aieoM.1&11•4 a•••-&n4 u...,.
tu. loia ot PHPl•, lo\a ot •oblllh,, Nd lo\1 et llOJlQ. la
\lle ~·' Wbiob I .. ll•M to talk atH>u• \od&f, \be ~' ••te4·
to peaoA&l •9"1o•• •dleota t.b1• po1at. V• a•-4 tor Ule•• ao\1•1•1•• a total ot 1,)24 people, anc1·,_.. aaoatJ.Jag to
•1.089.ais .t.o ,., tb•i• •1••1••· ,.,, •• tu iuae1t 1t.a a ov ' '
bwi.n,·-a. I•4 ltu· .to illPn•• oa .,.,. -. raot. V..$ ila.,,.,..,1. ve baff w b.ire I• '1li• \7" ot work oaa•t all be 111-...,oi.e•Jca'!
' " ~ . . ~ '
loa• •t tMa l'aak ·la bNW &.Dd ab1UtJ Y1tb tu P•t.e•• tc1tat1ata
of aoun. ti.• &Dd. •'•• aot to 1*'1 -... acc~lJ'. it •are
'to k••• uaea. BoY •• aa\ lara••' tt• in 08' btlc\p\ 1• tor .......... I
. ' don't t~ialc I.ba.e '° -.pba•l•• ~ 1~taac• ot r•• .. rob toc1a1--
11
![Page 13: REPORT OF THE JOINT COMMITTEE ON THE PEARL ......REF ID:A67551 REPORT OF THE Jonrr COMMITTEE ON THE INVESTIGATIOll OF THE PEARL HARBOR ATTACK Page 2.32: "The smcess achieved in reading](https://reader035.vdocuments.net/reader035/viewer/2022071416/611400cb2de23d3ad56ecd9e/html5/thumbnails/13.jpg)
• ., • .-,r-11 ... t~0·~~J'~i~J'-~~~;,;tue •tt•r with \be ' 1 - '
•:Us.Pl• .... , .... , ... t \he orntopapbic &ad. e.,-p'°8.1Jt1c t1•lcl•
»!'••••" •peoi&l pi-obl_. ill thi• ooameoi10D. '1'bat'• beoaue
the7 reall7 4oa•t b&v• tbe1r-o011Dte.,ar•• 1a civil attaira, a.ad.
aa a •••alt or4111&J'f' co•••o1al or 1Dd.uw1&1 orpn1aat1oa• doa't
go 1a. tor \bea. ~·•••, •uh oon.oena aa an beat 414u1pped.
to ccmduct rea-..o'b &M m..t Hlaotaa\ '° ao-cept coatN.ota troa
'U 'dllleaa tbe ,ea4 P"4'aO\ Y111 bl.Ve C-l'Oial &ppl10&b1li\7••
·0101' MPJ tew of . .- U:ii.JaCa .-ll:J bav•. - Aa a o.....-.c•, ti.
ailit.&17 oaa•t .. , U. dii-tct beaetit ot baaic ccmft'cial reeea.rch
iJl 'h• .. tielu~ &a4 it tb.9r• 1a going '° be &IQ' reaeucb in
th•,:ve•ye .IOt to 4o aoat ot it ova•l•••· Onl7 oooaatonallJ
&ff th••• •»'otal M•Ml'Oh probl ... tbat e&n be tane4 OU\-bJ
coat.Met. and when •• tiad th•, •• 4o ••· Our cr,ptoprapl:Uc a.ad
OJpt&nalJ'1ct exput'a feel Ul&t Vh11e the Pl'Olft88 •de 1D 'Ile
pa~~- -.it 4oMa or •o rear• •• been ftl7 aipit-1o&nt • in realttr.7
t.Mf are ovr•tl7 opuiatiag onlf ill th• opeaiq pba••• ot .._,
tbeJ tor• .. • u NTola\1oa&PJ' o....-a and 4eve1oiaenta 1.D '11••• t1elda •. Alld pl••• na••ber that.~ .__tot 110D.•1 de•izted,,
•i.216.100, 1• to oovn n•e&rcb.&ad de••lo~ aot OlllJ' of
aic-11at.ell1geac• ... baD1•• nt •l•o ot ••o-1tJ equtiaent. . . Ia taot, tbe'l&1'g• abliln 1• to be •o'kd to~ latter. fOI' ft
... t provide -. a.ae4 torcea wt\h 01_. •oMll•• bett• u..a. · ~o•• ot an1 ot,bltr &J'llJ 1a the vorld. Aa 'o -. abl.r• to be
4eTo••4 to reae&Jteaa 1a •1&Ml 1Dhil1gence, •• real1M t;bat vbil•
tad• .,.., on Ma9Ucb cauot _.oc:1.ue 1.D.te111g911oe# o.alJ' b7
0 onts.auu• reeeuoll ca.a••••••• Mohaioal ~oat1nu1\J 1D.
'.
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- -~-----:-~~~~------------.............. .. . e e REF ID:A6_7~5·
..-&.iot.1 -ams-a' tor aol••1~•••• ~pie Who ••'9111 -ppeaoe t~ 1Dt•111 .. aoe. V1thout auob
".eoi.ueal a14a ,,_, woult be poyerl••• \odAJ.
A• tor the ot!Mr ~'-9 .. ta the budget, I waat 'o •nt1on
br1etl7 •lJ tvo: PM4•e·• lto. to• t,12,910~, 1• to cover th•
produotioa of oOllllUDioats.-. ... v1tr ecau..-.• tor coabat organ.1-
1s&\1oaa. A l.US• •bare d, •,tr.Mt. 1• tor "1• CODY•••1on. ot OU of
our cipher •obia•• ta peao••liae d1ab1but1oa •o •• to·Jt•duc•
ti. M.S&l'da of ooaprold.•iaa ''- r•l •chill• "MrYed for V'&JI•
tiM u••· Pl'ojeot 221 acl.._.• t8171 275 to .. equipiaeat and th1•
11 'o o~ftr ~ epeoial·a .. 4• 1Jl th• war ot·•ob1Ae17 tor 1.D.t•P•
oept1Ag radio .... , .... I auat'tell rou tb&t radio tl'&ll•ai••1oa
.. O&J:d ... bl.ft ••ta.4 ..... ,. .. too, to-. th• .,.. or baDd•
••'' 4ot &ad d&•b •• .. ••• are ove~. Va111oua ton• ot u\ .... 17
i-apid ud o91)llcate4 ... .-.. •• vaa.111ae1ou, with or v1\llout
,aoruabliag ~ eac1phe1'99a•,· are o0111q to be ••4 aore &Gd S>r•1
it we are to •t11C17 eucb.~aaionaJ ve'.,.. 1ot to be able \o
oon \ta•. Aleo,." as\ be •bl• to loo.t• auob traaaa1tt.r•
b7 41MJ'1on filat1q te6balqu• .. tor 1a ~-time \b11 1• hiahlJ
1t.••••...,.• Ooabi••d. .auoo••• ill 1atercept1oa. aa4 41nct1oa f1A4-
1q 4-..4• t.ba\ •• proy14• ov••l••• with D.ft .. us.raent to ... ,
an ae\boda.
Ia oloa1Dg.. I wa't oao• ..-ta to impn•• upon 7ou th• tact
tbat aip&l illtellS.C-o• &ad 00111atcat1oa HOV1tJ oonat1,ut.e
aoae ot our beat Yeapona &ad tbat to ue Ul• auoe1atlall7 ••
llU\ keep th .. •·h-date aa4 ab&rp. Jtiaall.J', I want to •7
,,.,.' :i1Ul1' i;i;_
~\f;, '<\fiC.-
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- ' • • l
REF lD:A67551
e e SEUrET e • \b&i 1a all theae •tt••• -- .ll"IQ' &ad the kq coopeat. &ad
are oool"din&,•4 to a -.xi .. dean• w1\b1D th• 11.m.t• illpoae4
b7 tb.• preHD.t ••parat• erpaisatioa ot th• t•o ••i-•1c••· fh•• 1• JlO o••rlapptac ancl ao \1Dllto•••1'7 o:r u4eta•bl• 4Ql1oat1on
ot work1 and ~re 1• a ooaplete •baring ot reault• .,_,.,... th••·
·' -
Vt~•·\:~- 20:::COl:il 1.;, 7:; tl:'.11(;,.,,
-if::'.11;' DO :1"/i:SJ.F.:11 S
\'
' ' ~----.................. _________ ...._