From Halopedia, the Halo wiki
Conflict:
Insurrection[1]
Date:
Between March 13, 2502 and 2506[Note 1]
United Nations Space Command
Insurrectionists
ORION Project operators[1]
Insurgents[1]
Operation: TANGLEWOOD was a classified operation of the United Nations Space Command during the Insurrection in which ORION Project operators battled insurrectionist forces.[1] Avery Johnson had participated in this operation.[2]