Forgotten Posters of World War II

Dozens of World War II posters warn people at home and abroad about enemy eavesdropping. From cautionary admonitions ("Even in this friendly tavern there may be enemy ears") to humorous observations ("Even a fish wouldn’t get caught if he kept his mouth shut"), the message is clear.

Take a look at some of the best examples:

• Don’t discuss secrets on the telephone
  
  
• Action speaks louder when not betrayed by words
  
  
• Don’t be a blabbermouth
  
  
• Don’t tell strangers anything they cannot read in newspapers
  
  
• Spies don’t wear uniforms
  
  
• Enemy ears are listening

Only a foolish person would talk to strangers about important military plans. The king of foolish people, "Joe Dope," was the star of many military posters.