Charlie Chaplin made silent films to help the government sell bonds in 1918.
The clips above is a part series of sketches involving various bonds like the bond of marriage and friendship and, last but not least, the Liberty Bond, providing the government with enough weapons to beat the Kaiser.
Another advertising poster for World War I Liberty Bonds.
The August 1943 issue of the 4 Favorites shows the «War Bond» beating Hirohito, Adolf Hitler and Benito Mussolini.
Source: New York Times.