Whakakihia te rerenga e whai ake nei: I whakaekehia e te Soviet Union a Poland i te Mahuru 1939 i raro i te Molotov-Ribbentrop Pact me Germany; te Soviet Union
I whakaekehia a Finland i Whiringa-a-rangi 1939; i te Pipiri 1941, i whakakore a Tiamana i te kirimana kore-whakapae, ka whakaekehia 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 kaore he punaha radar tino kaha, tino kaha.