Operation

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: ABLE SENTRY - A force reconnaissance operation Edward Buck participated in to prepare for Operation: PHALANX on Circinius IV.


 * Operation: ASTUTE TIGER - An operation Edward Buck participated in on Harvest which consisted of deploying ADM's to predicted Covenant landing zones prior to UNSC evacuation.


 * Operation: ATHENA (2558) - Operation launched to discover the location of the Absolute Record.


 * Operation: ATLAS VIGILANCE (2558) - An aborted ONI mission undertaken by Spartan Vale that involved securing Shipmaster Ori 'Sumai at Salia III.


 * Operation: BLIND FAITH (2552) - A combined UNSC and Sangheili battlegroup follow the Prophet of Truth to Installation 00, locating and assassinating the leader of the Covenant.


 * Operation: BLOWBACK (2552) - The UNSC covert operation to gather intelligence and destroy Covenant ships in Sub-sector 35.


 * Operation: BRAVADO (2552) - An operation of involving Vice Admiral Michael Stanforth.


 * Operation: BREADCRUMB - A mission in which Captain James Cutter was involved at some point.


 * Operation: CARRION HEART (2553) - A UNSC operation details of which have been redacted by the ONI, though Fred-104 participated in it.


 * Operation: CARTWHEEL (2540's) - A SPARTAN-III Beta Company mission.


 * Operation: CHARLEMAGNE (2496) - The deployment of a company of SPARTAN-I operatives against Insurrectionists over Eridanus II.


 * Operation: CLEAN SWEEP - An operation during the Insurrection.


 * Operation: COALPEPPER - A Spartan-IV operation in 2555 to recover the Huragok Quick to Adjust from United Rebel Front-controlled Talitsa.


 * Operation: COUGAR REDEMPTION (Prior to 2557) - UNSC operation undertaken by Kelly-087.


 * Operation: DAWN ECLIPSE (Prior to 2558) - A mission during which Spartan Locke served as security for an ONI xenoarchaeological survey team at a redacted location.


 * Operation: DAYBREAK - Highly classified military exercises conducted by the UNSC Navy on Oban.


 * Operation: DELHI (Prior to 2558) - A denial of material mission against insurrectionist forces on Hat Yai, during which Spartan Locke succeeded in destroying twenty-one special technical assets.


 * Operation: DEVIL FREEDOM (Prior to August 2552) - Operation involving Kelly-087, who assisted the evacuation of civilians and targeting of Covenant landing craft for orbital bombardment on Imber


 * Operation: EASTERN AZURE (Prior to 2558) - A surveillance mission at Arcadia undertaken by Spartan Locke.


 * Operation: FAR STORM (2555) - Joint UNSC-Swords of Sanghelios mission to Installation 00.


 * Operation: FIRESIDE (2552) - An ODST mission on Ariel.


 * Operation: FIRST STRIKE (2552) - A small SPARTAN-II offensive against the Covenant battle station Unyielding Hierophant.


 * Operation: FLINT DEVIL (Prior to 2557) - An operation undertaken by Kelly-087 during which she was deployed to Installation 03 to provide security for a research facility on the ring.


 * Operation: FOCUS LENS 2555 (2555) - A joint-service exercise on Mars simulating a second invasion of the Sol system by the Covenant undertaken by Holly Tanaka.


 * Operation: GUARDIAN LANCE (2540) - The recovery of Covenant technology by the UNSC on Jericho VII.


 * Operation: HEMORRHAGE (Prior to August 2552) - Operation involving Kelly-087.


 * Operation: HORN AND HIDE (Prior to August 2552) - Successful assassination of a San'Shyuum missionary on Odenli'sh by Linda-058.


 * Operation: HYPODERMIC (dates unknown) - A mysterious and secret ONI project that has been in progress since 2531.


 * Operation: JOINT MONITOR (After November 2552) - Biohazard containment operation following the Battle of Voi in which Alpha-Nine participated.


 * Operation: JOVIAN WHISTLE (May 2553) - Operation conducted by the UNSC on the human colony of Gao in order to retrive Forerunner technology on the planet.


 * Operation: KALEIDOSCOPE (2502) - The assassination of rebel political leader, Jerald Mulkey Ander, on Harvest.


 * Operation: KINETIC STORM (During or after 2553) - A series of reconnaissance and strike operations in an unknown Joint Occupation Zone in which Edward Buck participated.


 * Operation: LAND GRAB (2558) - An mission which saw the neutralization of Covenant positions inside Requiem.


 * Operation: LEFT JAB (2552) - UNSC Naval operation in support of Operation: UPPER CUT during the fall of Reach.


 * Operation: MAD HATTER (Prior to 2558) - A mission during which Spartan Locke was a part of a counter-mobility strike in a redacted location on Jiralhanae-controlled "forgeship" Boundless Artifice.


 * Operation: OCEAN BREAKER (July 2552) - Spartan-II's deployment on Sigma Octanus IV.


 * Operation: OCEAN RAPTOR (Prior to 2558) - An UNSC operation that took place at a location redacted by the ONI. It was undertaken by Fireteam Stingray under command of Spartan Olympia Vale.


 * Operation: PALE SHADOW (Prior to 2537) - UNSC operation on Eirene involving Kelly-087.


 * Operation: PHALANX - An operation on Circinius IV.


 * 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: ROCK HOUSE (Prior to 2530) - Operation undertaken by Fred-104 in which he neutralized an insurrectionist facility and personnel on Eridanus II.


 * Operation: SWORD 52 (August 2552) - Support of evacuation operations during the Siege of New Alexandria in which Alpha-Nine participated.


 * Operation: TALON (September 2525) - Operation of the UNSC to capture Colonel Robert Watts from the URF's Eridanus Secundus undertaken by Blue Team.


 * Operation: TANGLEWOOD - A mission in which Avery Junior Johnson took part as a private.


 * Operation: TENDRIL


 * Operation: TORPEDO (2545) - The attack on Covenant refinery planet Pegasi Delta by SPARTAN-III Beta Company.


 * Operation: TREBUCHET (2513) - A lengthy UNSC conflict against Insurrectionists.


 * Operation: UPPER CUT (2552) - The UNSC deployment of the Sabre fighters against the Covenant onslaught during the Fall of Reach.


 * Operation: VERITAS (2496) - ORION Project operation which uncovered Secessionist Union undercover agents occupying high offices within the Colonial Military Authority.


 * Operation: WARM BLANKET (2544) - Classified ONI operation to retrieve the captured Dr. Catherine Halsey from a Covenant fleet following the Battle of Miridem.


 * Operation: WHISPER AMONG STARS - An operation in which Captain James Cutter was involved at one point.


 * Operation: WHISTLE STOP (May 2558) - An UNSC operation on the surface of Ven III to recover a bioweapon from the hands of a Sangheili and numerous Kig-Yar pirates, slavers, and smugglers.


 * Operation: WHITE GLOVE (2552) - The demolition of CASTLE Base to prevent it from capture.

List of appearances

 * Halo: The Fall of Reach
 * Halo: First Strike
 * Halo Graphic Novel
 * Page 122
 * Halo: Ghosts of Onyx
 * Halo: Contact Harvest
 * Halo Wars
 * Halo Wars: Genesis
 * Halo 3
 * Halo: Helljumper
 * Halo Legends
 * The Package
 * Halo: Blood Line
 * Halo: Reach
 * Halo 4