For further context the phrase was largely leveraged to stop the spread of bad news on the war front. They were fairly confident that a German spy network didn’t exist within American society at the time of the campaign, but didn’t want negative press to circulate about the war effort.
Gto here with your WWII propaganda slogans
https://en.m.wikipedia.org/wiki/Civil_disobedience
For further context the phrase was largely leveraged to stop the spread of bad news on the war front. They were fairly confident that a German spy network didn’t exist within American society at the time of the campaign, but didn’t want negative press to circulate about the war effort.
https://en.m.wikipedia.org/wiki/Loose_lips_sink_ships