The US once tried to firebomb Japan
. The surreal plan was the brainchild of an American dentist, who had enough sway on Eleanor Roosevelt to get his plan trialled by the US.
The bat-bomb would explode mid-air. It would scatter dozens of bats, each individually packed, and tied to a small incendiary charge on a timer. The idea was that the bats would scatter to roost in the wooden rafters of Japanese buildings. After a while the charge would alight itself, and the building would burn down — bat and all.
The concept, which gloried in the name of Project X-Ray, was abandoned after some test bats got loose and burned down an Air Force hangar.
More: Wikipedia, The Atlantic, American Psychological Association