Kammala jumla mai zuwa: A lokacin yakin da ke tsakanin Finland da Soviet Rasha (1918<unk>1920) sojojin Finland sun mamaye yankin da ke kusa da Pechenga, kuma sakamakon yarjejeniyar Tartu a 1920 ya zama wani ɓangare na Finland a matsayin Petsamo. An gano nickel a shekara ta 1921 kuma an fara amfani da shi a kasuwanci a 1935. Soviet ta kama yankin a lokacin Yakin hunturu a 1940 amma ya koma Finland a ƙarshen yaƙin. A lokacin yakin duniya na biyu,
tsakanin 1941 zuwa 1944, an yi amfani da Petsamo a matsayin tashar tashar jiragen ruwa don hare-haren da Finland da Jamus suka kai a Murmansk. Jirgin sama daga jirgin saman jirgin sama na Burtaniya HMS "Furious" ya kai hari a tashar jiragen ruwa a ranar 30 ga Yuli, 1941. Red Army ya kama yankin a lokacin Petsamo<unk>Kirkenes Offensive a 1944 kuma a 1947, bayan yarjejeniyar zaman lafiya ta Paris, an haɗa shi cikin Tarayyar Soviet.