Everyone knows about the overpowered, Titan pwning weapon that is the drawbridge. Got a problem with a dragon? Smash it with a drawbridge. A demon? Smash it with a drawbridge. A noble? ..You get the idea.
Anyway, i've found something that doesn't take too kindly to being atom-smashed.
A Wagon.
These mythical beasts are often tamed by merchants as beasts of burden, but they are super-strong megabeasts really.
My defence consisted of a 3 way funnel, with the middle route wide enough for wagons that would be closed off during a siege or whatever. The other two passages would act as tunnels for the invaders to run through to get trapped/ballista'd/crossbow'd to death.
Picture the scene...
Around the silent upper levels of a fortress, a shout is heard
An Ambush! Curse them!
The alarm is raised. The defensive drawbridges are raised, preventing enemy access to our ballistas. As defensive preparations are being made, another call is made:
The human caravan has arrived...
...Oh dear. I quickly sent out my crack squad of champions to go and fend off the invaders (i thought there would be more than just one group). They do so, and quickly destroy the enemy before they can ruin inter-species relations. As they're heading back to the fortress for a nice glass of Dwarven Wine, they remember that the drawbridges must come down, and don't want to be underneath them when they do. They wait, a few metres from the entrance.
The caravan rolls past, nodding and waving to the friendly dwarven faces as they do so. They stop where the entrance should be. Which is also where the drawbrdige will come down. Very shortly, since the lever has already been pulled. The champions cover their eyes as the drawbridge falls...
...And open them to find a wagon, rolling through the gateway. The bridge is nowhere to be seen.
I'm not joking, a wagon just took on a drawbridge and won.
This, by all accounts, makes wagons the strongest and most fearful megabeast around.
Fear them, for one moment they will be happily carrying goods, but the next...
Drawbridges beware.
(Interesting yet unrelated note, this fortress has been attacked by four dragons, and all have been killed by the same wrestler. One was thrown in the river. Another had it's head pulled off)