 Ramba uchinyora ndima iyi - Mafungiro evanhu akanga achinyanya kusada Japan, uye pakanga pane kushora kuduku kutsigiro yakawedzerwa yeChina. Pashure pokupinda kweJapan muManchuria muna 1931, United States yakataura dzidziso yaStimson, yakatumidzwa zita raGurukota reHurumende Henry L. Stimson, ichitaura kuti hapana nharaunda yakakundwa nesimba rehondo yaizobvumwa. United States yakabvawo muWashington Naval Treaty ichiganhurira uwandu hwezvikepe zvegungwa semhinduro yokuputsa kweJapan Chibvumirano cheNine-Power uye Chibvumirano cheKellogg-Briand. Kuramba kwevanhu kuJapan kwakawedzera muAsia kwakanga kwakawedzera muHondo yechipiri yeChina neJapan apo Imperial Japanese Army Air Service yakarwisa ndokunyudza US Yangtze Patrol gunboat muRwizi rweYangtze apo ngarava yacho yakanga ichibvisa vanhuwo zvavo kubva kuNanjing Massacre. Kunyange zvazvo hurumende yeU.S. yakagamuchira ruregerero rwepamutemo rweJapan uye muripo wechiitiko chacho, zvakaguma nekuwedzera kurambidzwa kwekutengeserana neJapan uye kuwedzerwa kunoenderana kwechikwereti cheU.S. uye rubatsiro kuChina. Pashure pokunge United States yabvisa Chibvumirano cheKushambadzira nokuFambisa Chikepe cha1911 neJapan, Japan yakasimbisa Chibvumirano cheMatatu ndokutanga kupinda muFrench Indochina. United States yakapindura nokuisa kurambidzwa kwakazara kuJapan kupfurikidza neExport Control Act ya1940, ichimisa maakaundi ebhengi eJapan, kumbomisa kutaurirana nevamiriri veJapan, uye kupa China kupfurikidza neBurma Road. 