Garrosh Hellscream escaped justice with the assistance of the bronze dragon Kairozdormu, eventually finding himself in an alternate Draenor in the time before the original Horde had come to Azeroth. Hungry for vengeance, Garrosh provided his father, Grommash Hellscream, with the technology to assemble his ideal army—the conquering force called the Iron Horde. Grommash was quick to unite Draenor's orcish clans under his banner, and the clan leaders became the Iron Horde's warlords. Among them were the bloodthirsty Kargath Bladefist, the cunning Blackhand, the elder shaman Ner'zhul, and the fearless Kilrogg Deadeye. The Iron Horde took command of several vital locations on Draenor, subjugated the ogre city of Highmaul, and built massive fortifications like Blackrock Foundry to outfit the warlords' armies. Once the Iron Horde had Draenor in its grasp, the orcs invaded Azeroth through the Dark Portal, razed Nethergarde Keep, and seized control of Dreadmaul Hold. In retaliation, Khadgar assembled the champions of the Alliance and the Horde, leading them through the portal to stop the Iron Horde on Draenor once and for all. Garrosh ultimately met his end at Thrall's hands, and after an exhausting campaign, the heroes of Azeroth were able to defeat most of the Iron Horde's warlords. Khadgar's offensive dealt a crushing blow to the Iron Horde. Grommash's failure to give his warriors the victory he had promised bred dissent within the ranks, affording the warlock Gul'dan the opportunity to usurp the Iron Horde and summon the demonic Burning Legion to Draenor...