Vanessa greets you on your return with a silent acknowledgment of what you've done, then starts to tell you what's next for you. "As a member of the Defias, you will be accorded certain liberties," says Vanessa. "The first—and perhaps most pressing—is your choice of assignment. Some of our number are to go to the heart of Stormwind's occupation into our lands and wait there until the dawning comes. The rest are to stay here and defend the Deadmines in case of an unexpected occurrence. The choice of who to accompany is yours."
Visit this "heart of the occupation". Stay in the Deadmines.