Since “loose lips sink ships,” keeping people from oversharing during WWII was a huge deal. These posters were created specifically to remind people to keep quiet about what the military was doing.
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To help keep an eye on the war, during both WWI and WWII, the Navy asked to borrow binoculars from American citizens, paying them $1 per pair – which was much cheaper and simpler than buying new optics for the military.
