The UNSC Aegis Fate, Hull Classification Symbol FFG-307, is a Frigate of the UNSC Navy.
The Aegis Fate took part in the attempt to stop the Prophet of Truth from activating the Ark's Portal. In the cut-scene, it can be seen firing MAC rounds at the Forerunner Dreadnought alongside the UNSC Forward Unto Dawn and an unknown UNSC frigate. The Aegis followed the Covenant Separatists' First Sangheilian Fleet into the portal and survived a further engagement between the Sangheili and Truth's fleet.
In the ensuing Battle of Installation 00, the Aegis Fate was last seen in a stationary position in the atmosphere of the Ark over a Brute encampment in the desert regions (the multiplayer map Sandtrap). It is unknown whether or not Aegis Fate ever made it back to Earth.