During the cold war, the threat from the soviet union prompted americans and canadians to establish military bases throughout canada, alaska, and greenland known as Distant Early Warning Line (DEW Line).
Distant Early Warning Line (DEW Line), a Cold War communications system that connected more than 60 manned radar stations, stretches 4,800 kilometres (3,000 miles) from northwest Alaska to eastern Baffin Island. For the United States and Canada, the network acted as a warning system that could identify and confirm the approach of Soviet-made aircraft or intercontinental ballistic missiles (ICBMs). During the Cold War, the DEW Line and other early-warning facilities served as potent deterrents against Soviet aggression.
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