Final answer:
Citizens who bought war bonds during the war were promised repayment with the benefit of interest.
Step-by-step explanation:
During the war, citizens who bought war bonds were promised their money back with the benefit of interest. Purchasing these bonds constituted both a patriotic act and a secure investment, as they guaranteed repayment with interest after the war ended. This interest incentivized citizens to contribute financially to the war effort, anticipating economic relief and personal gain upon the conflict's resolution.