 Nyorai kupfuurira kweiyi ndima - Pakurwiswa kweGermany kuNorwaymuna April 1940 Jahn Dahm akanga ari mudzidzi ane makore gumi nemapfumbamwe okukura wezvemichina paBergens Tekniske Skole. Akanga ave ari mutevedzeri anoshingaira weredhiyo uye nhengo ye Bergen Radio Relé Liga kwemakore, uye kumba aivawo neshopu yekuvaka maredhiyo. Pana 25 June 1940, apo akanga ane bvunzo pachikoro, akaendeswa kuhofisi yeGestapo muBergen, uko akatarisana nemidziyo yakatorwa kubva kumba kwake uye akaudzwa kuti aizopomerwa mhosva yekuongorora. Pana 28 June akaendeswa nebhazi kubva kuBergen kuenda kuMøllergaten 19 muOslo nevamwe vasungwa gumi. 