From Halopedia, the Halo wiki
Conflict:
Human-Covenant War[1]
Date:
Early 2537, before July 27[1][2]
Location:
Bonanza asteroid belt[1]
Outcome:
UNSC victory[3]
United Nations Space Command[1]
Covenant[1]
Spartan-III Alpha Company[1]
Covenant fleet[2]
Operation: HWACHA was a successful operation of the United Nations Space Command against Covenant fleet forces in the Bonanza asteroid belt, during the Human-Covenant War in early 2537. The SPARTAN-III program's Alpha Company was deployed during the operation in counter-boarding actions against the Covenant fleet,[1][2] in which they highly distinguished themselves.[3]