US trained Alaskans as secret 'stay-behind agents'

Fearing a Russian invasion and occupation of Alaska, the U.S. government in the early Cold War years recruited and trained fishermen, bush pilots, trappers and other private citizens across Alaska for a covert network to feed wartime intelligence to the military, newly declassified Air Force and FBI documents show.

Invasion of Alaska? Yes. It seemed like a real possibility in 1950.