Answer:
finance American war efforts during World War 1
Step-by-step explanation:
There were 4 Liberty Bonds issues between 1917 and 1918. These bonds were very important back then since they were used to finance American involvement in World War 1. The interests earned from the first issue were even tax exempt up to $30,000 which was a lot of money back then.
Besides helping the US fight WWI, Liberty Bonds are still important because the law that authorized them is still currently used to authorize all the issuance of US securities. Very few laws have had such a long life span and really with given a lot of use.