LeTourneau electric arctic land train. 54-wheel-drive
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Lots of info and history here.
Tell me more, about this occasion...???????"The bat bomb consisted of a bomb-shaped casing with over a thousand compartments, each containing a hibernating Mexican free-tailed bat with a small, timed incendiary bomb attached. Dropped from a bomber at dawn, the casings would deploy a parachute in mid-flight and open to release the bats, which would then disperse and roost in eaves and attics in a 20–40-mile radius (32–64 km). The incendiaries, which were set on timers, would then ignite and start fires in inaccessible places in the largely wood and paper constructions of the Japanese cities that were the weapon's intended target. "
Was a failed experiment as the bats would freeze at high altitudes. It did work on one occasion though.
From Wikipedia:Set fire to a USAAF hanger IIRC.