Military action
The rebellion had to prepare defenses for upcoming armies of Kritus; Cannons installed, legions being trained, and more crystal they produced was brought up from an underground farm. Although the revolution was done successfully, they still entirely not sure if those new inventions can be able to defeat more bigger armies.
By the end however, they managed to not only force attackers to retreat, but also causes heavy catualties like both sides have never seen; More than half of attackers died within a month.
The siege inspired them to consider not only to fight for independence, but an oppotunity to stop the empire's influence upon themselve as well.