HMS Cassandra was a Homer-class battlecruiser of the Royal Manticoran Navy.
In 1903 PD, the Cassandra was a part of Battlecruiser Squadron 15 with the HMS Achilles. In 1904 PD, the Cassandra and the Achilles were transferred to Battlecruiser Squadron 5's second division. During a gunnery exercise in the Hancock System's asteroid belt, both ships were able to defeat the rest of the squadron. In 1905 PD, the Cassandra fought in the First Battle of Hancock. (HH3)