User blog comment:Western Gen/Speculations for Season 12/@comment-174.236.71.161-20140116165410/@comment-166.205.68.28-20140122032927

Dictionary.com defines an Insurrection as shown below- insurrection — noun

an act or instance of rising in revolt, rebellion, or resistance against civil authority or an established government.

The Insurrectionist Group was formed by veteran soldiers, discharged soldiers, farmers (as pointed out before), and mercenaries who wanted to leave the UNSC and break ties with Earth's government. How are they not?!