Oh, it's a big cannon. Usually it's tracked and fires explosive shells. Uh, don't worry too much about it.

[Because they would be SO. EXPENSIVE. to bring to France and across the country. And also people might, like, have issues with Operation Let Teenagers Fire High Explosive Munitions.

And Kano's idea is better.]

We could make real ones that fire things! That's even better. We could make trebuchets and catapults. And maybe get a few spare cannons, too. There's a practical lesson in there somewhere, I'm sure.