The Vykarian System was once brought into compliance by Horus and the 63rd Expedition. Now ruled by Governer Wreavv, left in charge by Horus himself. The system has flourished. Earning reputable standing with a local Knight world led by House Carstin, and making ties of friendship with a nearby Forgeworld.
As as the years went by, so did thoughts of the crusading fleets of the now Wasmaster Horus. But when contacted by close advisors of Horus and senior Captains from the Sons of Horus, enquiringly as to the strength of Wreavv's loyalty, alarm bells began to toll. Within days, news of Horus' rebellion reached Vykaria. Scant hours later, astropathic messages were intercepted telling of Horus and his allies journey to Vykaria. Word was sent to Malcador, Dorn, Guillimam and Sanguinius. Word, and Pleading.
When the Warmasters forces made the real space transition into the edge of the Vykaria System they were met with crippling fire from the rapid response retribution fleet standing sentient around Vykarias precious planets. Much of of the loyalist forces Had made planet fall, forcing the traitors to do the same. With the loyalists fiercely dug in, this would be Istvaan 5's Redemption.
War are had come to Vykaria, the Victor to be decided.