[Calvin Locke]

The US Navy was developing a "cruise missile" during WWI.

A mini biplane launched from a rail, maybe 1/4 size or so. Engine had a counter to drop the ordnance.

When the Army found out the Navy was developing such a weapon, they hired inventor Charles Kettering to develop one for the Army.

I think the war ending before the projects were proved, and Kettering went on to run GM.

During WWII, the US Navy again was looking at a "cruise missile", the German V-1, to bombard Japan.

Again, the war ended...

[Stonewall Jackson]

During WW2 the Marine Corps tested a plan to put incendiary devices on bats and release them over Japanese cities. The bats would then seek shelter in the eaves and attics of the mainly wooden buildings, setting them on fire. The initial plans worked fairly well, but the project was suspended in 1943 in favor of the B-29’s and dropping standard incendiaries on the Japanese cities.