"Corn is a Source of Abundance" says this Soviet era poster. Generations of the Soviet people were brainwashed by nonsense like this. Rumors had it that on Khruschev's orders, corn was added to bread due to wheat shortages. Yes, "Abundance", Soviet style.
SOVIET PROPAGANDA POSTER “Don’t Gossip” and “Be on the lookout: These days, the walls talk.” In Soviet times, these kind of posters promoted discretion in wartime, lest the enemy hear you blabbering about military secrets.