From the Chronicle of the Good Duke, describing an expedition against English soldiers in the Bourbonnois country, late 14th century.
Another episode in the ages-long war between peasants and townspeople (on one side) and professional warriors.
So it was agreed to go to besiege La Bruyère in order that, when the Duke their lord came he would have to do only one siege. And in this way La Bruyère was besieged, and that was where the common people of the Bourbonnois they came to the siege, a d2000 of them; and the Count of Sancerre broke its ditches and the water ran out and the good people made so many faggots that they filled up the dishes and they made a "cat" to go to the foot of the wall, which was mined, and after that they threw fire inside, which burned everything. That way the great captains of those inside were all taken, Messire Richard Mauverdin and Jacques Sadellier; and the remaining English in the garrison inside were handed over to the commoners, who turned them into a big barbecue (qui en firent de grosses charbonées).
Image: I don't know if this counts as a "cat" or not.
Update: Will McLean suggests that the movable shed below in the foreground is a "cat."