Mezue ahịrịokwu na-esonụ: N'afọ 1937, Ọchịchị Ndị Agha Mmiri nke Ọchịchị Alaeze Ukwu na-achịkwa ụgbọ mmiri ndị agha. Site na mmalite nke Agha Pacific na mwakpo nke Pearl Harbor nke "Kido Butai" nke Combined Fleet (1st Air Fleet) mere, ndị Combined Fleet ghọrọ ihe fọrọ nke nta ka ọ bụrụ ihe jikọrọ ya na Imperial Japanese Navy, n'okpuru iwu nke admiral Isoroku Yamamoto ruo Eprel 1943 mgbe ọ nwụrụ mgbe ụgbọ elu ya gburu ndị agha US n'elu agwaetiti Bougainville. Ọ gụnyere ndị agha, ndị na-ebu ụgbọelu, ụgbọelu, na ihe ndị mejupụtara isi ọgụ nke IJN. E bu ụzọ kpọkọta ya n'ozuzu ya maka Agha Midway. Mgbe ndị na-ebu ụgbọelu na-efu na Midway na na
Mgbe agha Solomon Islands, ndị agha ụgbọ mmiri ahụ haziri ọzọ n'ọtụtụ "Area Fleets" maka njikwa arụmọrụ mpaghara mpaghara dị iche iche. Mgbe ahụ, ndị agha ụgbọ mmiri jikọtara ọnụ ghọrọ ndị ọrụ nchịkwa.