A lokacin Yaƙin Duniya na Biyu , Burma ta zama wani muhimmin batu na jayayya.Masu kishin kasar Burma sun rabu kan matsayinsu na yakin.Yayin da wasu ke ganin cewa wata dama ce ta sasantawa daga Birtaniya , wasu, musamman kungiyar Thakin da Aung San, sun nemi cikakken 'yancin kai kuma suna adawa da duk wani nau'i na shiga yakin.Aung San ya kafa Jam'iyyar Kwaminisanci ta Burma (CPB) ^[77] sannan daga baya Jam'iyyar Juyin Juyin Juya Hali (PRP), daga karshe ta hade tare daJafananci don kafa Rundunar 'Yancin Burma (BIA) lokacin da Japan ta mamaye Bangkok a cikin Disamba 1941.BIA da farko ta sami 'yancin cin gashin kai kuma ta kafa gwamnati ta wucin gadi a sassan Burma a bazarar 1942. Duk da haka, bambance-bambancen ya taso tsakanin shugabannin Japan da BIA game da mulkin Burma na gaba.Jafanawa sun juya zuwa Ba Maw don kafa gwamnati kuma suka sake tsara BIA zuwa Burma Defence Army (BDA), har yanzu a karkashin jagorancin Aung San.Lokacin da Japan ta ayyana Burma "'yancin kai" a 1943, BDA ta sake masa suna Burma National Army (BNA).^[77]Yayin da yaƙin ya juya da Japan, ya bayyana a fili ga shugabannin Burma kamar Aung San cewa wa'adin 'yancin kai na gaskiya ba shi da tushe.Cikin rashin kunya sai ya fara aiki da wasu shugabannin Burma don kafa kungiyar Anti-Fascist Organisation (AFO), daga baya aka canza mata suna Anti-Fascist People's Freedom League (AFPFL).^{[77 <]} > Wannan ƙungiya tana adawa da mamayar Jafanawa da farkisanci a duniya baki ɗaya.An kafa hulɗar da ba ta dace ba tsakanin AFO da Birtaniya ta hanyar Force 136, kuma a ranar 27 ga Maris, 1945, BNA ta kaddamar da tawaye ga Jafananci.^[77] Daga baya aka yi bikin wannan rana a matsayin 'Ranar Juriya'.Bayan tawaye, Aung San da sauran shugabannin sun shiga cikin kawance a hukumance a matsayin Sojojin Burma na Patriotic (PBF) kuma sun fara tattaunawa da Lord Mountbatten, kwamandan Burtaniya na kudu maso gabashin Asiya.Tasirin mamayar da Japanawa ta yi ya yi tsanani, wanda ya yi sanadin mutuwar fararen hula 170,000 zuwa 250,000 na Burma.^{[78 <>]} Abubuwan da suka faru a lokacin yaƙi sun yi tasiri sosai a fagen siyasa a ƙasar Burma, inda suka kafa fagen yunƙurin samun yancin kai na ƙasar nan gaba da yin shawarwari tare da Birtaniya, wanda ya kai ga samun 'yancin kai a 1948 Burma.