Buuxi weedhan soo socota: Dagaalkii Labaad ee Adduunka Nigel de Grey waxaa loo qoondeeyay "Koodhka Dowladda iyo Dugsiga Cypher" (GC&amp; CS) ee Bletchley Park, halkaas oo uu diiradda ku saaray taraafikada Jarmalka ee lagu xardhay mashiinka sirta ah ee Enigma. Bishii Sebtember 1941 wuxuu warbixin u soo gudbiyay Ra'iisul Wasaaraha Jarmalka oo uu ku sheegay in saraakiishii Jarmalka ay markii ugu horeysay u soo gudbiyeen guutooyinkooda booliiska.
iyagoo si habsami leh u duminaya tuulooyinka, kana saaraya dadka dagan. Mid ka mid ah idaacadaha ayaa ku faanayay in 30,000 oo qof lagu dilay "aagga dhexe". Kadib digniin uu ka jeediyay Churchill khudbad uu ka jeediyay baarlamaanka, wareysi Jarmal ah oo la soo saaray Oktoobar 1941 ayaa ka digay in aan la sii sheegin "hawlgallo xasaasi ah" kanaalka wireless-ka.