Southern Barrens is a war-torn land after the Shattering. Camp Taurajo has been attacked by the Alliance, in retaliation for the Horde’s offensive in Ashenvale; as well as an attempt to link Theramore to their northern bases.
Naralex, formerly sleeping in Wailing Caverns, has been rescued but has inadvertently created a wild mutant jungle in the zone due to the Emerald Dream breaking though.
They used to roam The Barrens are were the equivalent of the Fel Reaver to Horde players or the Son of Arugal for levelling Alliance. Killing Aean would guarantee the quest drop: The Runed Scroll which led you into the Den on Stonetalon Peak. A tough group to kill back then as they were all elite. However, concentrating your efforts into killing Aean if you were just after the quest was an option as the rest would reset pretty easily – assuming you didn’t want to kill them for the green they may drop as well.