Agincourt was a part of Battle Group India, under the command of Admiral Preston Cole, which took part in the Battle of Psi Serpentis. During the battle Agincourt charged headlong into concentrated streams of incoming plasma lines, sacrificing itself to save her sister ships. It was destroyed during the battle along with 70 other ships from the battlegroup.
- The vessel is likely named for the Battle of Agincourt, a battle between the English and French during the Hundred Years' War.
- Halo: Evolutions - Essential Tales of the Halo Universe
- The Impossible Life and the Possible Death of Preston J. Cole (First appearance)