Mars Campaign

The Argyre Planitia Campaign was a military campaign undertaken by United Nations force against human rebel forces on the planet Mars in December 2163. The Argyre Planitia Campaign marked the beginnings of the United Nations Space Command (UNSC), and the dedicated usage of large forces of Marines in space-to-ground attacks.

Background
In a conflict that stemmed from the Rain Forest Wars, the three primary Earth factions clashed again, this time on Mars. A series of lightning strikes against Koslovic forces near the Argyre Planitia marks the first extra-terrestrial deployment of Marines. The campaign was an unquestionable success. As a result, future military doctrines will favor large contingents of Marines for ground assaults and ship-boarding actions.