Other forms: insurgences
When a group of rebels rises up in an effort to overthrow a government, it can be called an insurgence. Most acts of insurgence are unlawful and violent.
The term insurgence, used interchangeably with insurgency, implies the use of violence by a small combative group against a lawfully elected government. Because of this negative, violent connotation, a government will sometimes describe a justified rebellion as an insurgence in order to turn public opinion against the rebels. The Latin root, insurgere, means "rise up" or "gather force."