(A usable Artillery.)

(Apparently, it can only be used by the members of the Asmodian legion that took the fortress.)

(The artillery seems to be working perfectly.)

You use the artillery. You finish the investigation.

(A usable artillery.)

(Apparently, it can only be used by the members of the Asmodian legion that took the fortress.)

You finish the investigation.

(A usable Artillery.)

(For some reason it isn't working properly.)

You finish the investigation.

(You successfully use the artillery.)

(Artillery skills can now be used.)

You finish the investigation.