You'll have to prove your worth if you want to hire some units, #.
You want to hire my dwarves? Go and kill some more orcs first, or something.
I'll have to trust you more before I can let you command my dwarves.
Prove your allegiance to the folk of Durin, and they will follow you into battle!
You've got no chance of commanding a dwarven army without some deeds to your name, lad!
Dwarves only follow into battle those that we can trust!