This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Kill 12 Galak Scouts, 10 Galak Wranglers, and 6 Galak Windchasers, and then return to Cliffwatcher Longhorn in Freewind Post.
NPC #4094 slain (12)
NPC #4093 slain (10)
NPC #4096 slain (6)
<name>, I entreat you to hunt these centaur down. They shall feel the wrath of our revenge. Attack the centaur camp to the north of Freewind Post! Let wrath guide your hand!