The mice chewed through all the wiring on the Nazi Panzers. True.
I’ve heard that Chicago and the surrounding suburbs won’t allow Romex for electrical wiring, even in residential construction. It all has to be in conduit. This is either due to the the electrician’s union or the concern that rodents chewing on electrical wiring can cause a fire. (They find it difficult if not impossible to chew through metal conduit).
This story has been repeated many times over the years, but its veracity is questionable. This is from someone who has owned restored classic cars many if not most with at least some rodent damage to the wiring. I am currently working on a rare 1942 Cadillac.
Typically, vehicles with fairly severe damage to the insulation still start up and run. But they can start blowing fuses as you drive them around, so you have to hunt down the problem spots and make some repairs.