A British first world war poster cautioning crews of ships to beware of spies

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Size: 3252px × 4624px
Photo credit: © CBW / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: awareness, beware, british, campaign, column, columnists, espionage, front, home, information, poster, posters, propaganda, secrecy, spies, spying, war, world, ww1, wwi