The Eagle-class frigate Mordred and her sister ship FWLS Gawain were both under construction in 3059 and were intended to be escort vessels for the third-of-class carrier of the Thera-class of carriers being built by the Free Worlds League, the FWLS Corinth. The Corinth was due to enter service in 3063 and would form the center of a battle group, alongside the Gawain and Mordred.
The Mordred was involved in a pitched naval battle in the Atreus system on the 25th of October 3068, when loyalist and Blakist elements of the Free Worlds League navy turned on each other; the Corinth and Mordred joined the Aegis-class heavy cruiser FWLS Nueva Badajoz, the Agamemnon-class heavy cruiser FWLS Aeneas, the Black Lion-class battlecruiser FWLS Xanthos and the Impavido-class destroyer FWLS Impavido. The Blakist-aligned WarShips attacked the loyalist WarShips in the system, which were mainly lighter destroyers and corvettes, and which consisted of the Gawain, the Impavido-class FWLS Janos Marik, the Zechetinu-class corvette FWLS Sparta, the Zechetinu II-class corvettes FWLS Acari and FWLS Scorpion and the Essex-class destroyer FWLS Raven.
The naval battle in the Atreus system was a victory for the Blakist forces; none of the Blakist WarShips were destroyed, although all of them had suffered damage, but of the loyalist forces, only the FWLS Acari and FWLS Raven escaped to seek refuge in the Duchy of Oriente.
The Blakists evidently modified the Mordred slightly while she was in their service, toughening the KF Drive and Jump Sail beyond the standard for an Eagle-class ship; the Blakists then deployed the Mordred alongside the Riga-class frigate WoBS Red Angel and the Essex-class destroyer WoBS Divine Forgiveness for their attack on New Avalon in 3072. The Mordred and the Divine Forgiveness both survived the campaign, although the Red Angel was lost; the Mordred was finally destroyed in 3077 during a major battle for control of the Dieron system by allied coalition naval forces led by Star Admiral James Lankenau.
The Mordred appears to have been named for a figure associated with the myths around the 5th or 6th century AD King Arthur; in this case, the illegitimate son of King Arthur. The pairing of the Gawain and the Mordred as escorts together may be an allusion to stories indicating that in some of the Arthurian tales Sir Gawain and Mordred are depicted as brothers. In the mythology Mordred is commonly regarded as a traitor who betrayed King Arthur, which the Blakist control of the Mordred may be a reference to.
- Field Manual: Free Worlds League, p. 119, "Renovation/Construction"
- Field Manual: Updates, p. 144, "Ships Of The FWL"
- Jihad: Final Reckoning, p. 128, "Captured Ships"
- Jihad Turning Points: Atreus BattleCorps Exclusive Track, p. 2, "True Colors Revealed"
- Jihad Turning Points: New Avalon, p. 13
- Jihad Turning Points: New Avalon, p. 5 Naval Support
- Jihad Hot Spots: Terra, p. 68, "Flight of the Raven"