6436 - An exploration probe from the Refugium colony of Polonius detects signs of intelligent life in a system 240 lightyears distant.
6916 - A contact fleet launched from Polonius reach the alien world and diplomatic contact begins. The aliens turn out to be Kesterists from the NoCoZo who give the Polonians the news that humankind has survived. This news eventually leads to the Schism War, as radicals want to rejoin the larger human community while traditionalists want the Federation to remain isolated.
7159 - Start of Schism War.
7340 - Schism war ends in the fracturing of the Refugium Federation. The radicals accept help from the Andian Mission and join the NoCoZo, while the orthodox worlds choose to remain isolated.
Polonius is among the radical Refugium worlds that has become aligned with the NoCoZo, and is now a major local capital and wormhole nexus in its own right..