From Halopedia, the Halo wiki
In February 2553, this ship transported Fleet Admiral Lord Terrence Hood to Sanghelios to meet with the Arbiter Thel 'Vadam to discuss terms of a ceasefire between their two races. During the meeting, the ship completed an orbit around the planet in an effort to map Sanghelios' topography.
The Iceni were a Celtic tribe inhabiting ancient Britain.
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