Quilboar Insurgency

Since the founding of Durotar & Thunder Bluff, war against the native Quilboar and invasive Centaur tribes has been the primary domestic opponents of the New Horde. Although the Centaur have been removed from Durotar and Mulgore, the Quilboar continue to resist the Horde's settlement in the regions. Bound by a fierce & unbreakable devotion to their fallen Ancient demigod Agamaggan, the Quilboar's war to reclaim their home from the Horde.

Origins
Although the conflict with the Orcs & other members of the Horde came with their arrival on Kalimdor's shores, the Quilboar have had a long, bloody history with the Tauren reaching back since after the end of the War of the Ancients. When Agamaggan fell against the wrath of the Burning Legion, his believed mortal children, the Quilboar, began to suffer from a growing, maddening rage. This rage eventually overtook the entire race & the Quilboar became the territorial and hostile people they are today. Throughout the Tauren's nomadic existence, conflict with the Quilboar proved bothersome. Rarely did Tauren venture south of the Barrens due to the Quilboar's Razorfen home guarding the sole pathway into the Thousand Needles.

With the arrival of the Orcs to what would become Durotar, the Centaur & Quilboar, although not entirely aligned, both worked against the Orcs & the Tauren. Even after the end of the Third War, the two races worked to push the Horde out of the continent but were steadily & repeatedly pushed back, with the centaur being pushed out of Durotar entirely by the time of the Cataclysm. The Quilboar, however, continued to resist.

Modern Era
Although the reach of their tribes has been diminished and the alliance with the Scourge cost them dearly, the Quilboar continue resisting Horde forces in the region, renewing their conflict with the Horde in earnest when Deathwing ravaged Azeroth. This renewed war has become known as the Quilboar Insrugency. Although lingering tribal resentment still exists between some of the tribes, the Quilboar have been almost entirely consolidated in their desire to see the Orcs & the rest of the Horde removed from Kalimdor.

The Alliance, hoping to gain an ally in the region, attempted to open negotiations with the Quilboar in order to facilitate a mutually beneficial relationship. Negotiations soured and the Alliance ambassador was nearly sacrificed, leading to a three-way conflict between the Alliance, the Quilboar, and the Horde within the now geographically distinct southern Barrens. Despite this initial breakdown, some Quilboar have opted to side with the Alliance against the vicious Horde assaults.