The secret world of Soviet maps

During the Cold War, the Soviet Union is belived to have produced more than 1.1 million topographical maps of the world in scales such as 1:100,000 and 1:50,000.

KALININGRAD
By Andrein (Own work) [CC BY-SA 3.0 or GFDL], via Wikimedia Commons

Across the world, only a handful of people are keen to study those maps in order to figure out what the Soviet Union had wanted to do with them.

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