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All four Scandinavian countries (Norway, Denmark, Sweden, & Finland) were deeply engaged in signals intelligence collection against the Soviet Union throughout the Cold War, albeit in great secrecy. Norway & Denmark, both of whom were members of NATO, worked closely with their American & British Sigint counterparts in monitoring military & civilian radio traffic coming from the Soviet Union & Eastern Europe. But the Norwegian & Danish Sigint services retained a high degree of independence because the American & British Sigint organizations were barred from operating on their soil. But both nations were heavily dependent on the US for financial & technical assistance throughout the Cold War. Neutral Sweden & Finland also devoted the vast majority of their Sigint resources to monitoring the military activities of the Soviet Union, although very little is publicly known about the activities of the Finnish Sigint organization. Available evidence suggests that Sweden, despite its neutrality, maintained a substantial clandestine Sigint sharing relationship with the US & GB, particularly during the early stages of the Cold War. 48 References. Adapted from the source document.