Editing 2551

{{Era|HCW}}
{{Yearnav
|image=File:H2A Terminals - BattleofMeridian.jpg|300px
|caption=[[Glassing]] of the [[UNSC]] [[Outer Colonies|outer colony]], [[Meridian]].
|century=26th century
|previous1=2549
|previous2=2550
|next1=2552
|next2=2553
}}
'''2551''' was a year in the 2550s in the 26th century.

==Events==
===January===
'''January 17'''
*[[UNSC]] [[Smart AI|"smart" artificial intelligence]] [[Iona]] begins service.

===February===
'''February 19'''
*As part of [[Project CHRYSANTHEMUM]], the [[SPARTAN-III]]s of [[Gamma Company]] begin their week-long augmentation process on the {{UNSCShip|Hopeful}} in [[Sector K-009]] folllowing its departure from [[Reach]].<ref>'''[[Halo: Ghosts of Onyx]]''', ''page 101''</ref><ref>'''[[Dr. Halsey's personal journal]]''', ''February 20, 2551''</ref>
'''February 27'''
*The ''Hopeful'' returns  to Reach following the Spartans' augmentation procedures.<ref>'''[[Dr. Halsey's personal journal]]''', ''February 27, 2551''</ref>

===Before May===
*Before '''May''', the {{Class|CAS|assault carrier}} ''[[Enduring Conviction]]'', led by [[Let 'Volir]], faces against the UNSC. During the battle, the ''Enduring Conviction'' performed impressive evasive maneuvers.<ref>'''[[Halo Wars 2]]''' - ''[[Phoenix Logs]]: Rise of Atriox III''</ref>

===May===
'''May 8'''
*[[Catherine Halsey|Dr. Catherine Halsey]] undergoes the [[Hemley & Aubourn Behavior Analysis]]; the results make ONI increasingly wary about her reported unreliability.<ref>[[Data Drop/HABA|Data Drop 3]]</ref>

===November===
'''November 24'''
*[[MJOLNIR Powered Assault Armor/Mark V (B)|Mark V[B]]], the initial production model of the [[MJOLNIR Powered Assault Armor/Mark V|Mark V MJOLNIR armor]],<ref>'''[[Halo Encyclopedia (2009 edition)]]''', ''page 94'' (2011 edition)</ref> enters service.<ref>[http://halo.bungie.net/News/content.aspx?type=topnews&link=BWU_012910 '''Bungie.net''': ''Bungie Weekly Update, 1/29/10'']</ref>

===December===
'''December 22'''
*The [[Car & Pilot Magazine]] releases its [[Car & Pilot: December 2551 Edition|December 2551 Edition]]. This includes a review of the new [[Civilian Warthog|2553 edition of the Civilian "Hog"]].<ref>[http://halo.bungie.net/News/content.aspx?type=topnews&cid=896 '''Bungie.net''': ''AMG Civilian Hog Review'']</ref>

===Unknown===
*[[Pawel Czernek]] and [[John Tippett]] enter active service with the [[UNSC]] [[UNSC Marine Corps|Marine Corps]].
*[[Concord]] is [[Defense of Concord|attacked]] by the [[Covenant]]; the colony survives largely intact. The [[MJOLNIR Powered Assault Armor/Venator|Venator]] [[MJOLNIR Powered Assault Armor|MJOLNIR [GEN1]]] variant gains prominence in the attack.<ref>'''[[Halo 4]]''', ''MJOLNIR/Venator armor description''</ref><ref name="bits">[https://www.halowaypoint.com/en-us/community/blog-posts/canon-fodder-bits-pieces '''Halo Waypoint''' - ''Canon Fodder: Bits & Pieces'']</ref>
*[[Gray Team]] is deployed on a mission against a Covenant facility within humanity's former territory.<ref>[https://www.halowaypoint.com/en-us/forums/db05ce78845f4120b062c50816008e5d/topics/catalog-interaction/4c3e1c6f-6519-4ee0-83a4-4bac13bf07a3/posts?page=6#post105 '''Halo Waypoint''': ''Catalog Interaction'']</ref>
*The [[Battle of Meridian]] ends. [[Meridian]] is [[glassed]] and [[Chalybs Defense Solutions]] facilities on the [[moon]] are abandoned. The Covenant discovers a [[Luminary]] on Meridian that leads to [[Earth]].<ref>'''[[Halo 2: Anniversary]]''', ''[[Terminal (Halo 2: Anniversary)|Terminal 1]]''</ref>
*The {{UNSCShip|Iroquois}} begins construction.<ref name="Mythos">'''[[Halo Mythos]]''', ''page 82''</ref>
*[[Veta Lopis]]' mother dies.<ref>'''Halo: Last Light''', ''page 365'' (Google Play edition)</ref>
*The [[Combat knife|M11 combat knife]] is manufactured by the [[Watershed Division]].<ref>''[[Halo: Official Spartan Field Manual]]'', p. 182</ref>

==Sources==
{{Ref/Sources}}