Whakaotihia te rerenga e whai ake nei: I te 9 o Akuhata, 1945, na Joseph Stalin, i runga i te whakaaetanga ngaro i te Huihuinga o Yalta i te Hui-tanguru, i whakakorea te 1941 Soviet-Japanese Neutrality Pact (1941) me te whakapuaki i te pakanga ki Japan. Nō reira ka tīmata te Pakanga o Rōpū Hāpana-Rōpū, me ngā Rōpū Hāpana
te whakaekenga o Manchuria i runga i ngā pae e toru.