Quadrant 4 was a region in the northern hemisphere of Harvest.
On February 4, 2531 a group of UNSC aerial reconnaissance Hornets discovered a battalion-sized mass of Covenant. Sergeant John Forge was sent from Alpha Base on a reconnaissance patrol to determine the strength and intention of this mass, but the Covenant presence was not there. Later in the day when Alpha Base was overrun by the Covenant, John Forge fought though this quadrant to reinforce the base, rescuing several scattered UNSC forces along the way.
List of appearances