In 2552, when the Covenant attacked Reach, Freemont sent a signal to all UNSC ships in the Epsilon Eridani, Tantalus and Jericho systems, demanding an immediate recall of all vessels to Reach, due to a fleet of some 300+ Covenant vessels entering the system. He was supposedly KIA when the Covenant destroyed FLEETCOM HQ. He also ordered the Cole Protocol to be issued immediately for all vessels and stations in the area before his assumed death.
During the battle of Reach, Admiral Freemont was in command of the Epsilon Eridani Defense Fleet, the largest UNSC fleet outside of Sol, consisting of 100-150 ships and 20 Mark V MAC stations. During the battle, Freemont copied tactics used by Adm. Stanforth and organized his ship to fire in staggered salvos and used refit stations as sacrificial shields.