Commander Duron at the Dark Portal in Hellfire Peninsula wants you to bring Duron's Report to Amish Wildhammer.
I want you to speak with Amish Wildhammer, standing about 30 paces south of us, and catch the first flight to Honor Hold. When you arrive at Honor Hold, you'll be greeted by Marshal Isildor. I have prepared a report detailing our situation here. Give him the report, and tell him you're ready for duty.
You have your orders, soldier, now move out! And though your blood must be burning to help us against the fiends below, waste no time here. Honor Hold needs you even more.