In an attempt to strengthen their defensive positioning for their empire in the South Pacific, Imperial Japanese forces decided to invade and occupy Port Moresby in New Guinea and Tulagi in the southeastern Solomon Islands.
Nun intento de reforzar o seu posicionamento defensivo para o imperio no Pacífico Sur, as forzas imperiais xaponesas decidiron invadir e ocupar Port Moresby en Nova Guinea e Tulagi no sueste das illas Salomón.