If your character name is Eldric, Anathema, Inara, Krios, or Norn please turn back.

So in the campaign I’m running, the party will be moving into a town that is the walls of a fortress. One of six that run along the border between two kingdoms that have a bloody past and an unstable peace in the present. That tension coming to a head, the fortress/town there in is going to be sacked while they are there. They are still a relatively low level, and I want to make it more of a “stuck in a fight” rather than a “we need to stop this” kind of situation. It’s going to be a relatively large force attacking unsuspectedly, with the intent on taking the town. I plan it to be a part of a larger plot later on. Looking for any advice whatsoever.