FLEETCOM Sector Three is a sector of space as classified by the UNSC.
In 2543, Admiral Preston Cole was in command of the sector. During the year, at least two engagements took place there; the Battle of 18 Scorpii on March 6 and the Battle of Psi Serpentis on April 18.[1] In 2552, it was commanded by Admiral Michael Stanforth. During this year, the Battle of Sigma Octanus IV took place in this sector.[2]