Have the Dawi-Zharr ever led military campaigns into areas like Araby or The Empire?
I remember in the dwarves omnibus, during I believe the second to last chaos invasion the world edge dwarves army fought head to head with the chaos dwarves while the empire was fighting chaos humans the slayer king was leading that battle
They did
when Tamurkhan (a champion of nurgle) attacked the empire all the way to Nuln he hired a chaos dwarf artillery team and a chaos dwarf named character to just blast and cause massive damage and they were Very effective