In a conflict that stemmed from the Rain Forest Wars, the three primary Earth factions clash again, this time on Mars. A series of lightning strikes against Koslovic forces near the Argyre Planitia marks the first extraterrestrial deployment of Marines. The campaign was deemed an unqualified success. As a result, future military doctrines favor large contingents of Marines for ground assaults and ship-boarding actions.
The UNSC was established to eliminate the various Rebel organizations in the Sol System.
UN sponsored military forces begin a pattern of massive build-ups, culminating in the first real interplanetary war. After the successful Marine deployment on Mars, recruitment drives and propaganda tactics strongly bolster UNSC (United Nations Space Command) forces. UN forces defeat Koslovics (supporters of rabid Communist hard-liner Vladimir Koslov) and Frieden (a resurgence of fascism) forces on Earth, and then begin a systematic and dedicated drive to crush their remnants on the various planets they hold throughout the system. At the conclusion, Frieden and Koslovic forces are defeated, in the face of a massive, unified and very powerful UN military.
The Callisto Treaty is signed. The Frieden and Koslovics formally surrender to the UNSC, officially ending the Interplanetary War.
A Unified Earth Government is formed in the wake of the conflicts of the 2160s. Now, the victors were forced to deal with a less obvious but equally serious threat: overpopulation and a massive military that had no enemy to fight. In the post-war period there were massive population surges and the overpopulation, coupled with the destruction and famine bred by the Rain Forest Wars, threatened to destabilize the economy.