UNSC Cassandra

The Cassandra was a Marathon-class heavy cruiser that was stationed in the Alpha Centauri system during the 2540s.
== History ==
=== Early service ===
The Cassandra was originally constructed at Vekta Fleetworks orbital construction platform 225-C and launched in April 2538. She was later assigned as the flagship of Battle Group Alpha in October 2543, with her sister ships, UNSC Rydion and UNSC Hexis, commanding Battle Group Beta and Battle Group Proxima, respectively.
=== Operation: ARCHANGEL ===
During the Galactic Empire's invasion of Helghan in 2545, the Cassandra maintained geo-synchronus orbit over Pyrrhus, providing orbital fire support to UNSC forces in the city. The ship was eventually attacked and boarded by Imperial shock troopers led by Colonel Balvar Harric. Though some of the ship's crew managed to abandon ship, Captain Idris Hughes and ONI agent Hillary Massar were killed when Harric's troopers stormed the bridge. However, before Harric was able to obtain the launch codes for the ship's nuclear missiles - which he intended to use to destroy Pyrrhus - the cruiser's A.I. initiated the self-destruct sequence, killing Harric and crippling the Imperial battleship Dominance.