The United States government sold Liberty Bonds to citizens to help finance the war effort. Liberty Bonds, also called Liberty Loans, were United States government-issued bonds. They were an attempt by the United States to finance its involvement in World War I. When the United States entered the Great War in 1917, it was faced with a difficult question: how was the country going to pay for it? Out of that problem the Liberty Bond was created.

Liberty Bonds were the result of a law passed by Congress that allowed the government to petition citizens to help pay for the war. The bonds were a major step forward for Americans as investors. It was the first time Americans invested in individual securities. Bonds were also viewed as a way for Americans to show their support and patriotism.

The original Act of Congress is still used today as authority under which all United States Treasury bonds are issued. Securities, also known as Liberty Bonds, were issued in the aftermath of the September 11, 2001 terrorist attacks to finance the rebuilding of the areas affected.

Various posters were designed to promote the purchase of Liberty Bonds in support of the war effort.

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