Pedzisa mutsara unotevera: Muna 1941, U.S. yakaita zvisarudzo zvakatevedzana zvokutsigira China muhondo yayo neJapan: Zvinhu zveLend Lease zvakagoverwa pashure pokunge Mutungamiri Franklin D. Roosevelt azivisa kudzivirirwa kweChina kuva kunokosha kukudzivirirwa kweUnited States. Mukati mezhizha, sezvo Japan yakatamira kumaodzanyemba kupinda muFrench Indo-China, U.S., Britain neNetherlands zvakatanga kurambidza kutengeswa kweoiri kuJapan, kuchigura 90% yezvinhu zvayo. Chibvumirano chacho chakatyisidzira kushanda kweHondo yeKwantung, iyo yakanga ine varwi vanopfuura miriyoni imwe vakapararira muChina. Japan yakapindura nechiito chakanyatsorongwa chakasimba musi waDecember 7/8, panguva imwe chete ichirwisa Pearl Harbor, Philippines,
Malaya, Singapore, Hong Kong, Guam, Wake Island, uye Thailand.