A cikin yaƙin Tsibirin Savo an nutsar da jirgin ruwa na Australiya da na Amurka guda uku kuma an lalata jirgin ruwa guda ɗaya da masu hallaka biyu. Jafananci sun sami rauni a cikin jirgin ruwa guda ɗaya. Mikawa, wanda bai san Fletcher yana shirin janyewa daga Amurka ba, ya yi ritaya nan da nan zuwa Rabaul ba tare da yunƙurin jigilar jigilar kaya ba. Mikawa ya damu da rana ba game da jirgin saman jirgin sama na Amurka ba. Idan ya kasance a cikin yankin Rabaul da Kavieng kuma ya yi ƙoƙari ya ɓoye kayan aikin jirgin ruwa da ya rage, Mikawa ya yanke shawarar yin babban kuskure. Mikawa ya yanke shawarar janye dakarun sojan ruwa da suka rage a cikin jirgin ruwan. Mikawa ya yanke shawarar yin babban kuskure a lokacin da Mikawa ya yanke shawarar janye kayan aikin jirgin ruwa da ya rage a cikin jirgin ruwan.
yanke shawarar kada a yi kokarin hallaka jiragen ruwa na Allied.