Mezue ahịrịokwu na-esonụ: N'ịmara nnukwu ikike mmepụta ihe nke America n'oge agha, ma nwee olile anya na ihe ịga nke ọma Axis na Europe ga-egbochi ihe ndị Allies nwere ike ime na Pacific, Imperial Japanese Navy (IJN) gbasoro usoro ha na-asọpụrụ oge iji merie agha dị oke mkpa na mbido agha dị mkpirikpi, mgbe nke ahụ gasịrị ọ nwere ike ịkọwa usoro udo. Na December 7, 1941, ndị Japan ji obi ike malite usoro nke mwakpo n'ala na n'oké osimiri n'ihe fọrọ nke nta ka ọ bụrụ n'otu oge. Otu n'ime ndị a kpagburu ndị agha mmiri America ruo nwa oge site n'ibibi ụgbọ agha ya na Pearl Harbor. N'ime ọnwa anọ sochirinụ, ndị agha na ndị agha mmiri nke Japan chụpụrụ ndị America na Philippines ma kpochapụ ihe ndị America nwere ike ịlaghachi na Philippines site n'imeri Wake Island na Guam. N'iguzogide ndị Britain, Japan mikpuru ụgbọ agha ndị a na-akwanyere ùgwù, wakporo ihe onwunwe ndị dị na
Malaya na Borneo, manyere inyefe Singapore, ma mebie ọnọdụ ndị Britain na Ceylon. E merikwara ihe onwunwe ndị Netherlands nwere n'Ebe Ọwụwa Anyanwụ India, na-eme ka Japan nwee ike inweta nnukwu mmanụ ala. A chụpụrụ Australia na New Britain na akụkụ ụfọdụ nke New Guinea. Mgbe ahụ, Japan mere ka ókèala ha gbatịkwuo agbatị gburugburu alaeze ukwu ha site n'ime ka ọtụtụ ebe ndị ha meriri ọhụrụ sie ike.