After the Third World War concluded in 2072, the nations aligned with the losing factions faced severe consequences. Finland, Norway, and Sweden were particularly affected, enduring heavy economic sanctions and internal turmoil. These countries struggled to stabilize their economies and governments while managing social unrest. In response, temporary administrations were established, overseen by an alliance of European Union nations. Their mandate was to maintain order, enforce reparations, and ensure compliance with post-war agreements, including damage reimbursements from the eight-year-long conflict.
Amid this turbulence, a new political faction arose in Norway, advocating for the welfare of the population and promising relief from economic hardship. By emphasizing national sovereignty and stability, the faction gained rapid support, extending influence into Sweden and Finland. The transition of power was relatively smooth due to the weakened state of the post-war societies.
The establishment of the Nordic Union, however, did not go unchallenged. Neighboring nations, wary of the Union's growing power, responded with resistance. Small-scale skirmishes erupted as the Union asserted control. In May 2075, the Nordic Union formally declared war, marking the beginning of what would become World War 4. Over the following years, the Union expanded its reach, occupying Estonia, Latvia, and Lithuania, and incorporating Karelia, which had gained independence from Russia after the previous conflict. Despite prolonged hostilities, the Union maintained these territorial gains.
By 2087, both sides were exhausted, and a weary stalemate set in. A ceasefire was negotiated, concluding twelve years of warfare. The Nordic Union emerged as a unified entity, encompassing its original nations—Sweden, Finland, and Norway—along with the newly acquired territories of Estonia, Latvia, Lithuania, and Karelia. This consolidation established a new era of political and economic stability in northern Europe, uniting a region long fractured by war and sanctions. The Nordic Union's governance, built on both strategic expansion and internal consolidation, endured as a significant power until the eventual collapse of civilization.