Legio V Revinco

Let by the Draenei Vidicator Maraad, one of the most legendary Paladins of that race, the Draenei Fifth Legion is one of the supporting legions to the cavalry flankers, alongside the orcish Legio I Infernus.

Legio IV Victrix

 Led by the renowned warrior, Orgrim Doomhammer, this primarily Blacrock-composed legion assists in the forming of the center line, taking up position on both sides of the Legio III Invicta. While a few members of this clan joined Blackhand in his failed attempt to kill Harry and his companions, Doomhammer challenged the older orc to a deathmatch, and killed him to claim the title of Warlord.

Legio III Invicta

Lead by the legendary warrior and warlord, Grommash Hellscream, this legion is made up mostly of the members of his own clan, the Warsong, and forms the solid, unbeatable center line of Avalon's battle formations. The Warsong are always the first ones into the fight, and the last ones out, and that is just how they like it.

Legio II Umbra

"The Shadow Legion", as it is sometimes called, is composed Primarily of the powerful shamans of the Shadowmoon Clan, led by their highly respected and powerful leader, Ner'zhul. Given their lack of brute strength melee fighters, they fill a greater support role, taking their place with the magic-wielders and the archers.
This does not, however, make them any less dangerous than the close-combat clans, such as the Warsong or the Blackrock.

Legio I Infernus

Formed primarily, though not exclusively, from members of the Burning Blade clan, Legio I Infernus takes great pride in their duties. While not members of the heavy, center line legions such as the Blackrock or Warsong, they never the less are of drastic importance due to their assignment as the infantry support for the flanking cavalry pincers.
Lead by their Warlord, Azuka, after she slew her own father in Mok'gora over the issue of joining Harry's faction.

The Council of Twelve

Made up of the Orcish and Draenei leaders that swore their aid and fealty to Harry Potter, the Council of Twelve are Harry's highest advisers (besides his lovers, naturally) and highest-ranking officers of war. While to an outsider it may seem unbalanced in favor of the orcs, this is far from true. given the more cohesive leadership of the Draenei, due to the fact that it was Velenara alone who led them from Argus to Draenor. This, as opposed to the Orcish clans being separate entities, has lead to only four of The Twelve being members of that race. The other eight members are the chieftains of the various Orcish tribes that were smart enough to listen to one Harry Potter when he showed up and warned them about the Burning Legion's trickery. Those tribes that refused were the first to suffer punitive action for siding with the Burning Legion.

The Council is made up of the following members:

ORCS:

Grommash Hellscream: Chieftain of the Warsong.

Durotan: Chieftain of the Frostwolves.

Azuka: Chieftain of the Burning Blade.

Ner’zhul: Chieftain of the Shadowmoon. Highly respected.

Orgrim Doomhammer: Chieftain of the Blackrock.

Kaz the Shrieker: Chieftain of the Laughing Skull, second mate of Durotan.

Rexxar: Chieftain of the Mok’Nathal. Technically more of a philosophy than a clan, but many are half-ogre.

Fenris the Hunter: Chieftain of the Thunderlord, eldest Frostfwolf sibling.

DRAENEI:

Prophet Velen: Overall leader of the Draenei

High-Priestess Ishanah

Vindicator Maarad

Vindicator Yrel

Yrel

Amazing Photo Used With Permission by Krysdecker on Deviantart!

Born in the ancient temple-fortress of Karabor, Yrel was originally training to be a priestess, like her uncle-figure and mentor, Vele. However, that changed when a being introduced only as Catalyst appeared before the Draenei. He described the coming events that he had forseen, including the deaths of many thousands of Draenei to a demonically-controlled Orcish Horde. While many amongst the Draenei favored a preemptive strike, Yrel advised her "uncle" that it would be far better to convince the orc clans of the evil posed by the Legion, starting with their neighbor and highly-respected orcish leader, Ner'zhul.

The meeting with Ner'zhul was disrupted almost devastatingly by a pack of eredar, summoned by Gul'dan secretly, pretended to be Draenei and attacked the meeting. The three guards that had come with her and Velenara were slain, as were Ner'zhul's own guards, and as the last eredar prepared to strike down Velen, she claimed the crystal war-mace of a fallen Vindicator and slew him.

From then on, she swore to defend the innocent from the Legion, and immediately began training as a paladin. Taking to the training like a fish to water, she quickly rose both in power and rank, until she was personally handpicked along with Maraad to be the military leaders of the Draenei, subordinate only to Catalyst himself and, technically, to Velen.