REQ-153-N, also known informally as "Sniper Alley" to the UNSC and the "Librarian's Rest" to the Covenant is the UNSC designation for an area on Requiem. The area had a structure that led to where the Librarian's ancilla was located and where Jul 'Mdama set his base of operations. The site was destroyed with the rest of Requiem when the planet was pulled into its star: Epoloch.