The stones flew through the air, pummeling down the batterments. One strike, two strikes, three strikes. As many strikes as it would take to slight this part of the wall.
Again and again, the trebuchet swung, was reloaded, and swung again. The more stones were thrown, the fewer guards were on the wall, fearful though they were at the prospect of having their skulls bludgeoned with a projectile.
It did take a few days, but eventually. The walls began to crumble as the stones hit the middle of the wall; the grey fieldstone that kept the innards of the walls in place was slowly chipped away. Mood in the camp grew higher with each night, for they knew that they were making progress as the once formidable barrier started to show signs of weakness.
It collapsed in on itself on the fifth day. Just as the summer was truly beginning to pick up.
The breach was now there, but it goes without saying that it will be crowded with Svengalians before even one Greifswalder will be able to set foot within. Going in there will be a very gory and very violent matter. Not to mention that there will probably be archers on the remaining walls.
There are now a few things you could do; custom dictates that you can now demand their surrender again. As their walls have been breached, and as such, they are now vulnerable.
Alternatively, you could of course decide to broaden the breach, like twisting the knife in an open wound, which would open up more and more of the wall, though it might take a while, as the crew will probably need to procure new stones to hurl.
And while assaulting the breach now would be a very costly affair, you could always make it so that it is a distraction, with the other half of the army scaling the walls with some ladders. Thereby making it a two-pronged assault. Though this plan might have too many moving parts for it to work properly.
Lastly, you could always go for a full-on frontal assault, both upon the breach and upon the walls, combining the scaling ladder with an attack on the breach. It will probably be simple but costly, even with the cavalry dismounting to form an extra column of infantry.
What to do, what to do? These were the options you had to decide, but in the end, you decided to.
>Demand their surrender once more
>Broaden the breach
>Create a two-pronged attack plan
>Order a frontal assault.