Kammala jumla mai zuwa: A lokacin Yaƙin Duniya na Biyu Blamey ya umurci Rundunar Sojojin Australiya ta Biyu da I Corps a Gabas ta Tsakiya. A wannan matsayi na ƙarshe ya umurci sojojin Ostiraliya da na Commonwealth a cikin bala'in Girka. A cikin tsohuwar rawar, ya yi ƙoƙari ya kare bukatun Ostiraliya daga kwamandojin Burtaniya waɗanda suka nemi warwatsa sojojinsa a kan kowane irin manufa. An nada shi mataimakin kwamandan kwamandan rundunar Gabas ta Tsakiya, kuma an daukaka shi zuwa janar a 1941. A cikin 1942, ya koma Ostiraliya a matsayin babban kwamandan Sojojin Australiya kuma kwamandan Sojojin Kasa na Allied a Yankin Kudu maso Yammacin Pacific karkashin jagorancin Janar Douglas MacArthur. A kan umarnin MacArthur da Firayim Minista John Curtin, ya dauki umurnin kansa na New Guinea Force a lokacin yakin.
Kokoda Track yaƙin neman zaɓe, kuma ya sauƙaƙe Laftanar Janar Sydney Rowell da Manjo Janar Arthur Allen a ƙarƙashin yanayi mai rikitarwa. Blamey kuma ya shirya kuma ya aiwatar da mahimmancin nasara da yaƙin neman zaɓe na Salamaua<unk>Lae. Duk da haka, a lokacin yakin karshe na yakin ya fuskanci zargi mai tsanani game da aikin sojojin. Ya sanya hannu kan Yarjejeniyar Japan ta Bayarwa a madadin Ostiraliya a lokacin da Japan ta mika wuya a Tokyo Bay a ranar 2 ga Satumba, 1945, kuma daga baya ya yarda da mika wuya na Japan a Morotai a ranar 9 ga Satumba. An ci gaba da shi zuwa filin filin a watan Yuni na 1950.