An Operation is a planned military offensive conducted by a military force, generally against a specific enemy objective or group of objectives. Operations can be large scale military campaigns, battles or small, covert insertions. Operations receive unique code words to distinguish themselves from other actions without giving away sensitive information that could be intercepted by enemy forces.
Known UNSC Operations
- Operation: BLOWBACK (2552) - The UNSC covert operation to gather intelligence and destroy Covenant ships in Sub-Sector 35.
- Operation: CHARLEMAGNE (2496) - The deployment of a company of SPARTAN-I operatives against Insurrectionists over Eridanus II.
- Operation: FIRESIDE (2552) - Battle of Ariel.
- Operation: FIRST STRIKE (2552) - A small SPARTAN-II offensive against the Covenant battle station Unyielding Heirophant.
- Operation: HYPODERMIC (dates unknown) - A mysterious and secret ONI project that has been in progress since 2531.
- Operation: KALEIDOSCOPE (2502) - The assassination of rebel political leader, Jerald Mulkey Ander, on Harvest.
- Operation: PROMETHEUS (2537) - The attack on the Covenant shipyard K7-49 by SPARTAN-III Alpha Company.
- Operation: RED FLAG (2552) - A planned operation to capture a Prophet.
- Operation: TORPEDO (2545) - The attack on Covenant refinery planet Pegasi Delta by SPARTAN-III Beta Company.
- Operation: UPPERCUT (2552) - The UNSC deployment of the Sabre fighters against the Covenant onslaught during the Fall of Reach in order to capture a Covenant Corvette.
- Operation: BLIND FAITH (2552) - Preventing the activation of The Ark and Halo Installations.