The Soviet Union was known for its intense propaganda art.
Messages varied from inspiring photos of space travel to heavy-handed warnings to potential spies.
Retronaut collected and translated a series of Soviet posters from the 1950s aimed at preventing information reaching U.S. spies inside the U.S.S.R.
1958: "Do not talk! Strictly keep the military and state secrets!"
1953: "Vigilance, our weapons!"
1954: "Gossip, gossip - the hands of the enemy!"
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