Loose lips sink ships
In this mini-poster, a Canadian seaman urges people to keep quiet - inadvertently revealing sensitive military information might lead to the sinking of his ship.
Canada, National War Services, "Silence de ta part - convoi à bon port," n.d. [1942?]
War, Memory and Popular Culture Archives - The University of Western Ontario - London, Ontario
card, 9cm x 11.7cm