Tuhia he tomokanga mō tēnei wāhanga - I whakaekehia e te Soviet Union a Poland i te Mahuru 1939 i raro i te Molotov-Ribbentrop Pact me Germany; i whakaekehia e te Soviet Union a Finland
i Whiringa-a-rangi 1939; i te Pipiri 1941, ka whakakore a Tiamana i te kirimana kore whakaeke, ka whakaeke i te Soviet Union. Ahakoa he kairangahau me nga kaipūkaha rongonui a te USSR, i tiimata te rangahau mo te mea ka riro i muri mai hei radar ("radiolokatsiya", lit. radiolocation) i te wa tonu i te tangata, a he pai te ahunga whakamua me te whanaketanga o te magnetron wawe, i uru atu ki te pakanga me te kore he punaha radar tino kaha.