At the Second Battle of Harvest on March 1, 2526. It was destroyed by the single Covenant vessel's fourth salvo along with UNSC Troy and UNSC Lowrentz during Battle Group X-Ray's last desperate attempt to win the battle.
- The ship is likely named after Constantinople, the capital of numerous ancient and modern empires, now known as Istanbul.
- Halo: Evolutions - Essential Tales of the Halo Universe
- The Impossible Life and the Possible Death of Preston J. Cole (First appearance)