<prompt> Pedzisa mutsara unotevera: Soviet Union yakapinda muPoland muna September 1939 pasi peMolotov-Ribbentrop Pact neGermany; Soviet Union  <response>: yakapinda muFinland muna November wa1939; muna June wa1941, Germany yakabvisa chibvumirano chokusarwisa ndokupinda muSoviet Union. Kunyange zvazvo USSR yakanga ine masayendisiti uye mainjiniya akatanhamara, yakatanga kutsvakurudza pane zvaizova radar radiolokatsiya, lit. radiolocation nokukurumidza somunhu upi noupi zvake, uye yakafambira mberi zvakanaka nekutanga kwekugadzirwa kwemagnetron, yakapinda muhondo isina nzvimbo, yakakwanisa zvakakwana radar system. 