This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Gryan Stoutmantle wants you to kill 15 Defias Highwaymen, 5 Defias Pathstalkers and 5 Defias Knuckledusters then return to him on Sentinel Hill.
Some Defias have eluded us. My most trusted scout reports that these Defias have been looting and pillaging the countryside, all the way into Southern Westfall. We believe they are hiding out in the Dagger Hills, plotting their next move. Slay the wretches in the name of The People's Militia.
When I left the tainted lands of Lordaeron I returned to a grim state of affairs here in my homeland. But there is hope for Westfall yet. As proven by your valor in battle, it is obvious to me that you serve our cause with honor. It is with great pride that I induct thee into The People's Militia. May the Light shine upon you.