Gather your allies, <name>. You will need them if you are to face an overseer.
Once you have a suitable group, find and kill the overseers at each camp. Take their keys and use them to turn and fire the fel cannons upon the camps. Return to me once the camps are destroyed.
Is it done?
We are victorious! The Legion's advances have been halted!
I offer you a choice of rewards for your heroic deeds!
This is the Nagrand Forge Camp quest chain.