Operation

Operation redirects here. For the periodic updates to Halo Infinite, see Event.

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 Operations

Operation	Date	Description
Operation: ABLE SENTRY		A force reconnaissance operation, Edward Buck participated in to prepare for Operation: PHALANX on Circinius IV.
Operation: ACADEMIC	February 10, 2558	Fireteam Majestic was ordered to advance on Covenant cultists on a location on Requiem.
Operation: ALL-SEEING EYE	February 8, 2558	An operation that saw Fireteam Majestic recon for a location for a possible base establishment on Requiem.
Operation: ANCHORITE	October 2558	An operation undertaken by Fireteam Osiris to rescue Catherine Halsey from Covenant custody on Kamchatka during the Battle of Kamchatka.
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: BIRD IN HAND	October 23, 2558	A recovery operation undertaken by Spartan-II Blue Team in order to secure ONI research station Argent Moon.
Operation: BLEACH	February 2558	An ONI mission related to Mission to Alpha Shard, involving Codename: FIXER recovering information regarding it.
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	Aborted Spartan-II Black Team covert operation to gather intelligence and destroy Covenant ships in Sub-sector 35.
Operation: BLUE MOON	Prior to 2530	The operation involved the sweeping and clearing of a URF base on Eridanus II by an ODST team. Spartan-II Linda-058 provided cover fire for the team.
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: BREAKER TRIP	2559	An operation conducted by the UNSC during the Created conflict.
Operation: BRONZE COBRA	Between 2553 and 2557	An operation on Venezia undertaken by Spartan-II Linda-058.
Operation: BUMRUSH	October 20, 2552	An ODST mission during the Battle of Mombasa in which they had to infiltrate the CAS-class assault carrier Solemn Penance and force the ship down.
Operation: BUZZHAWK	September 2558	A Surakan Militia сounter-operation against Jiralhanae invaders on the planet Carrow designed to destroy their flagship, the Varric-pattern heavy cruiser Foebane.
Operation: CARRION HEART	2553	A UNSC operation details of which have been redacted by the ONI, though Frederic-104 participated in it.
Operation: CARTWHEEL	2540's	A SPARTAN-III Beta Company mission.
Operation: CHARLEMAGNE	2496	The deployment of a company of ORION Project operatives against Insurrectionists over Eridanus II.
Operation: CHATTERBOX	February 9, 2558	An operation in which Fireteam Crimson and Fireteam Majestic were tasked to remove Covenant cultists in certain locations on Requiem, with Majestic focusing on a communications array.
Operation: CIRRUS	2552	An operation in which Blue Team was tasked to rescue key military personnel from the Forerunner world of Onyx.
Operation: CLEAN SWEEP		An operation during the Insurrection.
Operation: COALPEPPER	2555	A Spartan-IV operation 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: ECDYSIS	Prior to 2560	A mission part of the Zeta Halo project undertaken at ONI Ilex Facility.
Operation: EASTERN AZURE	Prior to 2558	A surveillance mission at Arcadia undertaken by Spartan Locke.
Operation: FALLEN WALLS	2532	UNSC defense of Jericho VII
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: GREY VEIL	2544	An assassination mission on the planet Heian undertaken by an ODST squad accompanied by Spartan-II Cal-141.
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: HERODUCK		A mission in which Spartan-IVs conducted field tests of BARVO-class Mjolnir helmet.
Operation: HORIZON	Prior to 2544	An operation undertaken by John-117 with mission target to destroy Covenant exploratory fleet elements near Cascade.
Operation: HORN AND HIDE	Prior to August 2552	Successful assassination of a San'Shyuum missionary on Odenli'sh by Linda-058.
Operation: HWACHA	2537	Counter-boarding operation against Covenant fleet elements in the Bonanza asteroid belt.
Operation: HYPODERMIC	dates unknown	A mysterious and secret ONI project that has been in progress since 2531.
Operation: ICE DANCE	March 18, 2526	An engagement between the UNSC forces and the Insurrectionists on Seoba.
Operation: INSTINCT	2553	An operation during which Fred-104 rescued UEG diplomatic personnel and eliminated insurrectionist forces on the human colony of Andesia.
Operation: IRON FIST	Mid 2540s	An operation undertaken by John-117 during which he was deployed to Miridem with the duel goals of asset denial and partial recovery of critical cyberinfrastructure assets.
Operation: IRON GREAVE	Early 2537	An engagement between the UNSC and the Covenant on New Constantinople.
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 retrieve Forerunner technology on the planet.
Operation: KALEIDOSCOPE	2502	The assassination of rebel political leader, Jerald Mulkey Ander, on Harvest.
Operation: KICKSTAND	2559	An operation conducted by the UNSC during the Created conflict.
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	February 7, 2558	An mission which saw the initial assault and neutralization of Covenant positions inside Requiem.
Operation: LEFT JAB	August 14, 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: MARSH FLASH	December 3, 2552	An operation against clusters of Jiralhanae leadership attempting to activate an artifact in Arizona, directed by Fleet Admiral Joseph Harper. One of the final battles in the Human-Covenant War and the final battle in the Battle for Earth.
Operation: OCEAN BREAKER	July 2552	Spartan-II's deployment on Sigma Octanus IV.
Operation: OCEAN RAPTOR	Prior to 2558	A 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: OCTAGON	Prior to 2553	An operation undertaken by Linda-058. Mission details remain highly classified.
Operation: PALE SHADOW	Prior to 2537	UNSC operation on Eirene involving Kelly-087.
Operation: PHALANX		An operation on Circinius IV.
Operation: POLECAT		An operation on a remote world that held a Sharquoi hive.
Operation: PROMETHEUS	2537	The attack on the Covenant shipyard K7-49 by SPARTAN-III Alpha Company.
Operation: RED CLOUD		An ONI operation connected to the flood outbreak aboard the prison transport Mona Lisa.
Operation: RED FLAG	2552	A planned operation to capture a Prophet. Scrubbed by the Fall of Reach.
Operation: RED ROOM	Prior to 2530	An operation undertaken by Linda-058. Mission details remain highly classified.
Operation: RETRIBUTION	December 8–16, 2553	An operation undertaken to avenge the murder of Graselyn Tuwa and to rescue her family.
Operation: ROCK HOUSE	Prior to 2530	Operation undertaken by Fred-104 in which he neutralized an insurrectionist facility and personnel on Eridanus II.
Operation: SENTRY	Prior to 2558	Operation undertaken by Olympia Vale in which she served as an advisor to Central Command during negotiations between the UNSC and the Covenant fleet over Tribute.
Operation: SHELL GAME	2556	Operation undertaken by Fireteam Apollo to search for things of interest to ONI within the Threshold Exclusion Zone.
Operation: SILENT STORM	2526	Operation aimed at buying humanity time to create an effective defense against the Covenant early in the Human-Covenant War by striking hard and fast at their forces.
Operation: SLOW DIVE	2550	Offensive operation on a Covenant forward outpost
Operation: SMOKING ACES	May 1, 2531	Operation undertaken by Blue Team against the United Rebel Front at Camp New Hope on the colony of Victoria.
Operation: SPEARBREAKER	2559	Operation undertaken by ODST squad Sunray 1-1 during the Second Ark Conflict.
Operation: STONEBREAK		Operation involving at least one Orbital Drop Shock Trooper.
Operation: SUNSPEAR	September - December 2552	A secret ONI retaliatory mission against Sangheili naval commanders undertaken by Spartan-II Gray Team, which resulted in the complete destruction of the planet Glyke.
Operation: SWITCHBACK	Prior to 2544	An operation undertaken by John-117. Mission details have been redacted.
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		An operation related to the SPARTAN-II augmentation procedures.
Operation: THREE-CARD MONTE	February 11, 2558	An search and destroy operation for several Covenant cultist outposts on Requiem.
Operation: THRONE		Operation involving at least one Orbital Drop Shock Trooper.
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	August 14, 2552	The UNSC deployment of the FSS-1000 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: WEASLEY		A mission in which Spartan-IVs conducted field tests of the BARVO-class Mjolnir helmet.
Operation: WHISPER AMONG STARS		An operation in which Captain James Cutter was involved at one point.
Operation: WHISTLE STOP	May 2558	A 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 and SWORD Base to prevent them from capture.
Operation: WHITE SAND		An ONI operation connected to the flood outbreak aboard the prison transport Mona Lisa.
Operation: WHITE VAN	2558	An operation to provide security and oversight to Project SENIOR ICE on Oban
Operation: WINDOW PANE	October 20, 2552	A mission undertaken by the ODST fireteam Alpha-Five with the goal of acquiring the Forerunner artifact known as the Conduit from the Covenant.
Operation: WOLFE	October 7–12, 2559	A mission undertaken by Spartan-II Blue Team in order to recover the top-secret assets from the ruins of CASTLE Base on Reach.