What was the main funding source for the U.S. during World War I?

The primary funding source for the U.S. during World War I was Liberty Bonds. These were debt securities issued by the U.S. government to finance military operations and other expenses related to the war. The government encouraged citizens to purchase these bonds as a way to support the war financially, and they were marketed with patriotic appeals, emphasizing civic duty and national pride. Purchasing Liberty Bonds was a crucial part of the home front effort during the war, and it helped to mobilize both financial resources and public support for the war effort. The success of this funding mechanism demonstrated the government's ability to engage the general populace in the war finance process, making it a pivotal tool for sustaining the war effort.