Legio VII Percutio

Led by the long-lost son of Terokk, Rukhmari, the Legio VII Percutio is the somewhat under-strength heavy rapid-strike support legion of Avalon. Given their avian natures, the Arakkoa are less inclined towards the line of battle, and instead were dedicated to ambushes, scouting, or mid-night air raids in support of the War-Wing flights of the various Orc clans.

Legio VI Rapax

The Devouring Legion, led by the shamaness called Kaz the Shrieker, is so named not for any cannibalistic traditions, but the fang-filled skulls that they wear over their faces ask masks, in remembrance of their fallen. Primarily Laughing Skull orcs, this legion forms the second center line, supporting any wounded or exhausted units from the primary line and plugging gaps where needed.

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.