Early on, the group of career losers that are the protagonists get themselves thrown in prison inside of a military base. This base has hastily been set up in an abandoned manor that once belonged to a local lord.

Cannons are in most of the windows now, and snipers on the roof, which will make escaping difficult, but worse yet is the fact that the place seems to be ... slightly haunted. On top of the creepy ghosts, everyone's guns and other weapons have been taken.
Good luck with that, guys!