Editing Mars Campaign

{{Status|Canon}}

{{New content|[[Halo Mythos]]}}

{{Battle infobox

|prev=[[Rainforest Wars]]

|date=[[2163|December 2163]]-[[2166|July 2166]]

|result= Decisive [[United Nations|UN]] victory

*First use of [[UNSC Marine Corps|Marines]] off [[Earth]]

*Beginning of the [[United Nations Space Command]]

|commanders3=Unknown}}

The '''Mars Campaign''' was a pivotal military campaign undertaken by [[United Nations]] forces against human rebel forces on the planet [[Mars]] in [[2163|December 2163]]. The campaign marked the beginnings of the [[United Nations Space Command]] (UNSC), and the dedicated usage of large forces of [[UNSC Marine Corps|Marines]] in space-to-ground attacks.<ref name="HE33">'''[[Halo Encyclopedia (2009 edition)]]''', ''page 33''</ref>

In a conflict that stemmed from the [[Rainforest Wars]], the three primary [[Earth]] factions clashed again, this time on Mars.{{Ref/Reuse|HE33}} Attempting to bring the [[Human colonies#Interplanetary era|human worlds]] under a [[communism|communist]] state, the [[Koslovics|Koslovic]] rebels sought to take control of the plentiful corporate production facilities on Mars. In particular, the Koslovics concentrated their occupation to the shipbuilding facilities on the [[Argyre Planitia]]. The newly-established United Nations Space Command, created by the UN to combat the increasing threat posed by the rebel factions, responded with a series of lightning strikes on the Koslovic positions, deploying the newly-created [[UNSC Marine Corps|UNSC Marines]] in the first extraterrestrial marine deployment—a tactic which would define military doctrine for centuries. The campaign was an unquestionable success. As a result, future military doctrine favored large contingents of Marines for ground assaults and ship-boarding actions.{{Ref/Reuse|HE33}}

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{{Human wars}}