FDR and Fala
In 1941, Franklin Roosevelt's dog, Fala, was named "president" of Barkers for Britain.
At the time, Britain was besieged by German aerial bombings and U-boat attacks causing serious supply shortages. A program called "Bundles for Britain" was started in the U.S. with the aim of collecting cash contributions and donations to ease shortages in the U.K.
Barkers for Britain was created as an analog to "Bundles for Britain" with the goal of getting dog lovers to support the Bundles effort by buying special engravable dog tags at a cost of 50 cents each.
Barkers for Britain raised about $15,000 between April and October 1941. The tag picture above right is Tag #1 which, of course, went to Fala.