Basa raCalvert rakatevera raive kuMarianas, kwaakaitisa kuburitsa kunze kweTanapag Harbor paSaipan (15 kusvika 24 Chikumi) uye Tinian (24 Chikunguru), kuyedza kwakawedzera kubudirira kwekurwiswa kukuru paSaipan. Yakadzokera kuPearl Harbor muna August ichitakura vasungwa vehondo vechiJapan nechiKorea 420, uye mwedzi wakatevera yakanga yakatungamirirwazve kumadokero kuti igoverane mukupinda muPhilippines
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