This quest is not available in game.
Travel northwest along the road toward Shattrath and search for evidence of what happened to Deirom.
I don't suppose you've been here long enough to know Deirom, have you? He's a merchant with contacts among the various factions in Shattrath.
Don't ask me how he does it, but he manages to trade with them for some of the goods our quartermasters can't provide.
He set out for Shattrath three days ago and hasn't returned. He's normally able to make the entire trip in less than that. Keep an eye out for him and report anything you find to the mercenary captain, Thander.