Final answer:
A suitable slogan for Liberty or war bonds could be "Invest in Freedom — Buy Liberty Bonds", which underscores the patriotic duty and the economic benefits for the buyer. Posters with this slogan could include national symbols to inspire public support and emphasize the role of bonds in securing post-war prosperity.
Step-by-step explanation:
A good slogan for Liberty Bonds or war bonds for a propaganda poster could emphasize the role of every American in supporting their nation during times of conflict. For instance, you could use a slogan like, "Invest in Freedom — Buy Liberty Bonds". This invokes a sense of duty and positions the purchase of bonds as an investment in the nation's future freedom. The poster might also feature patriotic imagery such as national symbols or scenes of Americans at work, contributing to the war effort.
During both World Wars, propaganda played a crucial role in garnering public support for the conflict and financing through the sale of war bonds. Notably, these bonds represented a secure investment and were essential in supporting the economic health of the country post-war, by facilitating the production of consumer goods and holding down tax rates. Thus, a slogan could also highlight the practical benefits to citizens, such as "Secure Tomorrow — Your Bond Purchase Supports Our Troops and Your Future".