When Dragon was rediscovered and found wandering uninhabited systems in the declared independent space, the United Naval Forces volunteered two starfighter carriers to Operation Menelaus, fearing that the Pandorans might be making ready to commence their push beyond Mitikas.

Grendel and Grendel's Mother were sent to Aster to assist Griffin, Leviathan and Ifrit in reacquiring the battleship from the enemy, captaincy of the two vessels falling to Edward Silverthorne and Sima Mandeep respectively.

When the operation failed and Grendel was destroyed, killing all serving crew members, the UNF launched an investigation (the Menelaus Commission Report) to discover the steps leading up to the ship's loss and provide answers to the families and worlds of the crew that had been volunteered. Relationships between the UNF and CSN were soured for a time, but ultimately put aside when it was concluded that the enemy were always going to prove a difficult adversary to face.

The UNF was put under considerable strain when the Pandorans commenced their advancement out of Mitikas and into independent space, striking a number of star systems bordering Imperial space.

During the battle in Coyote, the UNF fleet was lead by Jennifer Bailey, who undertook captaincy of Talos.

Command of the fleet was later transferred to Adrian Parsons, who had been charged with seeing through Operation Sudarberg to completion. The UNF lost a considerable number of vessels during the battle, including Grendel's Mother.

The United Naval Forces was heavily reduced in size and power during the Pandorans' campaign, many of the vessels becoming part of the declared allied forces, headed up by the CSN. Joyle Lynch continued to act as the fleet admiral where appropriate, however most of the guidance for the remaining units came from the newly established allied command.

Following the end of the Pandoran War, the United Naval Forces were rebuilt, as the displaced peoples returned to their homes. Sima Mandeep took an active part in helping to rebuild the UNF, taking a step back from active participation in the field.