Dee ihe na-esote paragraf a - PURPLE bụ ihe na-adọrọ adọrọ, ma ọ bụ nke a kpaara ókè, na-eme atụmatụ na atụmatụ ndị Japan n'ihi ọdịdị pụrụ iche nke usoro iwu Japan tupu Agha (lee n'elu). Ná mmalite, ụzọ ka mma e si eme ihe bụ Usoro Ụgbọ Mmiri nke Japan (nke e ji mkpụrụ akwụkwọ nzuzo dee), nke ndị na-enyocha ihe nzuzo nke Ụgbọ Mmiri United States kpọrọ JN-25. Ịbanye n'ụdị e ji mee ihe n'ọnwa ndị sochiri December 7, 1941 nyere ihe ọmụma zuru ezu iji mee ka usuu ndị agha mmiri nke United States nwee mmeri n'agha ndị a lụrụ n'Oké Osimiri Coral
na Midway, na-akwụsị ndị mbido ndị Japan na-aga n'ihu na ndịda ma na-ewepụ ihe ka ukwuu n'ike ụgbọ mmiri ndị Japan. Ka oge na-aga, okporo ụzọ JN-25 mebiri emebi nyekwara usoro iheomume na ụzọ ụgbọ elu Admiral Isoroku Yamamoto ga-eji na-efe efe n'oge njem nyocha na ndịda ọdịda anyanwụ Pacific, na-enye ndị na-anya ụgbọ elu USAAF ohere ịdakwasị onye isi nke chepụtara mwakpo Pearl Harbor. Ka oge na-aga, inweta ozi ndị agha Japan site na decryption nke okporo ụzọ nkwukọrịta ndị agha nyere aka n'ịhazi mkpọsa nke agwaetiti ahụ na Philippines na gafere.