This BBC article about cats successfully holding down jobs, from mousers to mayors, is a couple of years old. But it's titled "Bureacats" and is timeless material.
Another wartime hero was Crimean Tom, also known as Sevastopol Tom, who saved British and French troops from starvation during the Crimean War in 1854. The regiments were occupying the port of Sevastopol and could not find food. Tom could. He led them to hidden caches of supplies stored by Russian soldiers and civilians. Tom, who was taken back to England when the war was over, died in 1856, whereupon he was stuffed. He is now a permanent part of the National Army Museum in London.