Harland
From Halopedia, the Halo wiki
Summary
A Corporal in the UNSC Marines, present at the battle of Sigma Octanus IV, he assumed tactical command on the ground when all but a handful of veteran marines were killed by Covenant forces. Harland and his team were on a scouting mission when all but himself and three other marines (Private Cochran, Private Fincher, and Private Walker) were killed by the fuel rod gun of a Hunter. The four fell back to their HQ which were destroyed by covenant. Finally, Harland and his marines were relieved by Spartan forces who landed to destroy the covenant.
He was later debriefed at Reach with the Master Chief.
His fate ultimately is unknown, leaving only five possibilities:
1. He died when the covenant glassed most of Reach,
2. He was honorably discharged and sent back to Earth.
3. He was re-assigned back to Earth.
4. Harland was re-assigned to another planet and perished
5. Harland is on security detail with the S-IIIs.