Dee ihe na-aga n'ihu maka paragraf a - Ndị agha ụgbọ mmiri jikọtara ọnụ bịara n'okpuru iwu nke Imperial General Headquarters na 1937. 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 e nwesịrị ọtụtụ ụgbọ mmiri ndị a lara n'iyi na Midway nakwa n'agha a lụrụ na Solomon Islands
N'afọ 1916, e mere ka ndị agha ụgbọ mmiri ahụ dị n'ọtụtụ "Area Fleets" maka njikwa ọrụ mpaghara nke mpaghara mpaghara dị iche iche. Mgbe ahụ, ndị agha ụgbọ mmiri jikọtara ọnụ ghọrọ ndị ọrụ nchịkwa.