Concert of Worlds

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Concert of Worlds

"An alliance of species built upon a foundation of strength and unity that comes from honor and acceptance, mutual trust, respect. A Concert of Worlds in an age of peace."
— Thel 'Vadam describing the idea to John-117.[1]

The Concert of Worlds was a proposed interstellar polity planned to comprise several Sangheili worlds[2] as well as other species.[1][3] The Swords of Sanghelios were expected to play a vital role in the organization.[3]



Arbiter Thel 'Vadam had the idea for the Concert of Worlds by October 28, 2558.[1]

In November 2559 during the Created uprising, the Concert of Worlds was officially proposed at the High Gathering by Arbiter Thel 'Vadam to the numerous Sangheili officials who were present. These officials couldn't come to any agreement and largely rejected the proposal. Instead, a number of them viewed the Created as a better alternative in terms of security. After the meeting, 'Vadam doubted that Cortana would have allowed the Concert of Worlds to act as a security alliance.[2]

Later, during a battle at Netherop, Oath Warden Crei 'Ayomuu would introduce the Arbiter as the de facto leader of the Concert of Worlds to members of the Defenders of the Sanctum despite the previously failed proposal.[4]

List of appearances[edit]


  1. ^ a b c Sunrise on Sanghelios
  2. ^ a b Halo: Outcasts, chapter 1
  3. ^ a b Halo Waypoint, Canon Fodder - Concert of Worlds (Retrieved on Sep 25, 2023) [archive]
  4. ^ Halo: Outcasts, chapter 12