|This article, Záviš Souček, was written by LoyalHaloFan. Please do not edit this fiction without the writer's permission.|
- "Those who were not willing to restore order were removed from society. It was necessary! The anarchy had to be contained, the people needed to know who was still in charge. Years from now they will revere me as their savior, not you, not Earth."
- ―Záviš to Noah Sówka.
Záviš Souček was a human politician and former governor of Mazovia. Following the colony's battle with the , Záviš enacted emergency powers and declared martial law across the planet. As anarchy and panic spread across the colony, Záviš ordered the to detain anarchists, bandits, political dissidents, and protesters. Anyone that was deemed a threat to "colonial security" were either imprisoned or executed. The purge was monitored and condemned by the surviving garrison and soon took measures to evacuate and rescue civilians in danger by Záviš.
These events created tension that erupted into an all out conflict between Selim Çelik's UNSC forces and Záviš's self-styled Mazovian Confederacy. The War on Mazovia would last less than a year and be grossly overshadowed by the impact of the , but would forever remain a significant event in Mazovian history.