TheCodeBreakers
Another attack was certainly in the offing,
but unless they could ascertain its location, France might be lost.
Into this dismal atmosphere on the morning of June 3 burst Guitard
of the Service du Chiffre, excitedly waving an intercept. One of the G.H.Q.
cryptanalysts, applying the keys that Painvin had sent there, had just
read a cryptogram sent at 4:30 a.m., only a few hours earlier:
CHI-126 FGAXA XAXFF FAFFA AVDFA GAXFX FAAAG DXGGX
AGXFD XGAGX GAVGX AGXVF VXXAG XFDAX GDAAF DGGAF
FXGGX XDFAX GXAXV AGXGG DFAGD GXVAX XFXGV FFGGA
XDGAX ADVGG A
Direction-finders reported that it had been transmitted by the German
High Command. The addressee, Die, was known from traffic analysis and
direction-finding to be the 18th Army's general staff in Remaugies—a
town situated just above the concavity in the German lines. Its plaintext
read: Munitionierung beschleunigen Punkt Soweit nicut [error for nichf
eingesehen auch bei Tag ("Rush munitions Stop Even by day if not seen").