Read Siege of Titan (Star Crusades Uprising, Book 1) Page 8
CHAPTER FOUR
The exact origins of the Zealots are still uncertain and their appearance on Proxima Prime has never been explained. Many colonists brought their sects and religions to their new homes but this cult quickly spread through the workers in the mining community. From there it spread like wildfire in the impoverished sections of society until they exploded into violence. Their demands have always been simple. They are a brotherhood that provides moral and physical guidance, their way is the one true way and it is their duty to help others come to that realisation.
It took less than six months for the cult to build their first bomb and to claim their first victim. After the Ontario incident, it took just weeks for similar attacks to spread. The message is clear. The Zealots will accept full conversion, nothing less. In the years and months that followed the terms insurgents, terrorists and Zealots came to mean the same thing.