In May of 1941 the U.S. Government began the sale of "Defense Bonds" to help allies in the war. When the U.S. entered World War II in December later that same year, the name changed to "War Bonds." Advertisements sprang up on televisions, radios, and in newspapers. Posters, like this one, were hung in store fronts and lobby's everywhere, urging citizens to purchase bonds to aid the war effort.