Just thought I'd let you know, the Bonus objectives, at least for Mongol camps, are randomized for each playthrough. Not sure if there's a pool or something, so...
Perfect world we have it say:
Bonus option 1
Bonus option 2
Bonus option 3
But of course it could just be pulled from a global pool and any bonus objective could be... anything, then scaled for that particular camp (like amount of enemies needed for a bonus objective, for example).