The campaign maps themselves consist of a segment from the main Storyline, mandatory main objectives, optional secondary objectives and some additional hidden objectives. Each campaign is progressively unlocked in a sequential order, by completing the previous campaign's main objectives in the relevant faction. Within each faction-based section, the player takes command of an ACU from the respective faction Dominic Maddox, Thalia Kael, Ivan Brackman. The overall campaign element of Supreme Commander 2 (excluding the tutorial) is split into three sections based upon the three factions UEF, Illuminate and Cybran.

WARNING: THIS ARTICLE CONTAINS SPOILERS! IF YOU HAVE NOT COMPLETED THE CAMPAIGN, TURN BACK NOW The campaign follows the stories of the three friends and their relationships as they are forced to fight members of the factions they were allies and friends with not long ago.

Each faction denies involvement while blaming the others and war erupts yet again. However, the peace is brought to an abrupt end by the assassination of the newly elected CDC President. This includes the campaign's 3 protagonists - one from each faction - who become friends at their academy. During this time the three nations have intermixed and some of their military recruits are even trained together at the same institutions. Since the defeat of the Seraphim the alliance forged by the UEF, Cybran Nation and Aeon Illuminate has held becoming the CDC (Colonial Defense Coalition) and resulting in 25 years of peace. Supreme Commander 2 is set 25 years after the events of Forge Alliance. If you haven't finished the campaign yet, please be wary! This article contains campaign details that may be considered plot spoilers.

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