Nyorera kupfuurira kweiyi ndima - Mharidzo yechiJapan musi wa9 Kubvumbi 1942 yakaratidza kuti "RZP Campaign" pamusoro pePort Moresby yaifanira kuva kupamba kwete kurwisa kwemhepo uye iyo yaizoparadzanisa Australia kubva kuAmerica. USN codebreaker Rudy Fabian pa FRUMEL akarondedzera MacArthur uyo aive "asingatenderi" sezvo aitarisira kuti chinangwa chaizove New Caledonia, saka Fabian akatsanangura (JN-25) kodhi-yekutyora maitiro uye akamuratidza mutungamiriri wechiJapan akabata meseji nechinangwa chekudzora mafambiro engarava yevavengi uye kurwisa mahombekombe ekuchamhembe kweAustralia. Naizvozvo kutakura kwaifanira kubva zuva rakatevera nokuda kweNew Caledonia kwakatumirwa kuPort Moresby. Musi wa 23 Kubvumbi Fabian akaratidza MacArthur kuti IJN yakanga ichiunganidza simba rakakura kuTruk, uye yakaronga kutora Tulagi zvakare. MacArthur akawana ndege yeAustralia yekuongorora kuti "iwane" simba rekupinda muPort Moresby musi wa5 Chivabvu, zvichitungamira kuHondo yeCoral Sea
(Ona Central Bureau).