Tuhia he haere tonu mo tenei whitianga - I te Akuhata 9, 1945, Joseph Stalin, i runga i te whakaaetanga ngaro i te Huihuinga Yalta i te Hui-tanguru, i whakakorehia te 1941 Soviet-Japanese Neutrality Pact (1941) me te whakapuaki i te pakanga ki a Japan. Nō reira ka tīmata te Pakanga o Rōpū Hāpana, i te whakaekenga a Rōpū Hāpana ki Manchuria
i runga i ngā pae e toru.