Whakakihia te rerenga e whai ake nei: Ahakoa te raru o nga whanaungatanga o te ao na te Russian Revolution i te tau 1917, i tere te whakapumautia o nga hononga taapori i waenga i te Russian Soviet Federative Socialist Republic, me te whakatu a Vatslav Vorovsky hei māngai taapori ki nga whenua Scandinavian o Denmark, Sweden me Norway. He poto te whakatuu a Vorovsky, i te mea ka tiimata nga whenua ki te whakakore i te whakaaetanga taapori o nga karere mai i te kawanatanga o Soviet, ana ka whai ake he waa kaore he tohu tae noa ki te whakatuu i te 1923 hei māngai o te Soviet Union ki Denmark. I te wa o te mahi a Geyn i te 18 o Hune 1924 i whakatuhia te misioni Soviet i Denmark, me Geyn hei kaihoko mana. I haere tonu te māngai ki te taumata o ngā miihana puta noa i te tau kotahi mano.
Ko te whakaekenga a Tiamana me te nohoanga o Rānana i te tau 1940, tae noa ki te whakaekenga a Axis ki te Soviet Union i te Pipiri 1941. I te Paenga-whāwhā o te tau 1944, i whakapā atu te Soviet Union, a, i tohaina he māngai ki te Kaunihera Motuhake Motuhake o Denmark.