While Orcs are often in clans, they sometimes form larger forces including partnering with dark elves against the forest elves and with other orc clans such as in the case of when 17 orc clans came together with dark elves to invade the central lands under the influence of the necromancer Uskuada.
The Battle of the Middle Lands - 1005
While battles for land raged across the central land, the powerful necromancer of Teratos, Uskuada, plotted in secret. Inviting representatives from Garganesh (now a province of Auquese), Nasgaroth, the Forgotten Territories (Territoire de L’Oubli) as well as the Misty Lands (Territoire des Brumes) to the secret city of Syrn where they hatched a plot. Uskuada wanted to take control of the central lands in to capture the magical energy needed to open a portal to Gadar-Hos, the realm of chaos, and therefore pull the whole world into darkness.
The Great Khan, motivated by his desire to raise the demon Tenamuach, would send his troops from Garganesh to Andore. Dark Elves and Orc tribes would march on the imperial capital of Mariembourg. And Uskuada would lead a legion of undead upon the centre of the empire.
Order of Our Lady of Redemption were able to discover this plot by Uskuada, follower of Teratos. The True Faith Holy See had also warned against in-fighting and urged unity to fight rising chaos.
Several years of fighting followed, with massive losses on both sides. Particularly horrifying were the mass sacrifices of whole domaines of people as the forces of chaos attempted to open their portals and summon their demons.
In the year 1004, Andorian troops were able to retake their lands and destroy Brutus’ monoliths. Driven mad with revenge at the defeat of his mercenaries, the Great Khan of Garganesh swore revenge. In the hidden city of Syn, he met with the necromancer Uskuada of Nasgaroth, representatives of the Terres de Brumes (Mistlands) and the Forgotten Territories. Together they planned an invasion of the central lands with the Great Khan focusing his force on Andore.
The destruction of Ilma Oron, which occurred during the Night of Ka-Ba-Oloth, had long been planned by Uskuada and the dark elves. The continuation of their invasion plan of the Central Lands depended on its success or failure.
The protective radius of the City of Oron covered one of the major telluric points necessary for the activation of the portal to Gardar-Hos. Annihilating the magical protection of the City was therefore an indispensable step before reaching the designated place.
The activation ceremony of the portal had to take place from this precise location, and it was not without difficulties because the entire kingdom of Irendille and well-intentioned people intended to mobilize to thwart it.
The region of Oron is very wild, covered with dense forest and crossed by numerous rivers. Fighting in this environment is not easy, especially against the border residents of Irendille who grew up there. The forces of Chaos know this and have prepared for it. Their army is supported by many forest trolls and green-skinned creatures.
Source: Document of the Great Battle 1005
1005 - Rise of Uskuda and the war of the Central Lands
Uskuada was a powerful necromancer from Nasgaroth. Driven by her devotion to Teratos and desire to open the portal of Gadar-Hos, she moved towards her objective to capture the major telluric points of power in the world. Uskuada’s quest led her to commit great violence.
An alliance of Andore and the True Faith was able to defend the telluric zone and keep Uskuada form using it to fuel the portal, but not before she destroyed the city of IIma Oron in Irendile.