Dee ihe na-aga n'ihu maka paragraf a - Agha nke Coral Sea nke dị na New Guinea na Mee 1942 bụ ọgụ ụgbọ mmiri mbụ nke IJN na-awakpo agha agha. N'agha a lụrụ na Midway n'ọnwa June, e gbochiri mwakpo ọzọ ndị Japan chọrọ ịwakpo ha. IJN tụfuru ụgbọ mmiri anọ na Midway, na-eme ka IJN ghara ime ihe ịga nke ọma ọzọ. Mgbasa ozi nke IJN na Aleutian Islands, kwa na June, bụ ihe ịga nke ọma ma ọ bụ obere ihe. N'ọnwa Julaị, IJA malitere mkpọsa ya n'ụzọ Kokoda
iji weghara Port Moresby, mana na nnukwu mmeri mbụ nke agha ahụ, ndị agha Japan kwụsịrị ma tụgharịa na Septemba site n'aka ndị agha Australia. Agha nke Milne Bay n'ọnwa Ọgọstụ bụ oge mbụ ndị agha Allied na-eguzogide ọgụ amphibious nke ndị Japan, na-amanye ndị agha Japan ndị rutere ịdọrọ. Agha nke Guadalcanal were site na Ọgọstụ 1942 ruo Febụwarị 1943 ma bụrụ nke mbụ ndị Allied na-aga nke ọma na Pacific. Ndị Allied weghaara Buna na Gona n'ụsọ oké osimiri ugwu nke New Guinea n'agbata November 1944 na January 1945. N'ihi ya, n'ime otu afọ a wakporo Pel Habọ, ndị Japan hapụrụ ndị ha na ha jikọrọ aka ka ha na-eme atụmatụ agha. E nwetara mgbanwe a n'ụzọ dị ukwuu site n'ịgba chaa chaa n'oké osimiri nke ndị Allied megide ndị agha mmiri Japan ka elu tupu a malite usoro ihe owuwu ụgbọ mmiri buru ibu nke America.