From Halopedia, the Halo wiki
The Nuan keep is a Sangheili keep on Sanghelios. During the Servants of the Abiding Truth's uprising in 2553, troops and ships from Nuan keep and Rtova keep arrived in support of the uprising, and helped in the assault on Vadam.
List of appearances
- Halo: The Thursday War (First mentioned)
- Halo: The Thursday War, page 114