1. an organized rebellion against a government or ruling authority, typically involving guerrilla warfare

Examples

• The government struggled to contain the growing insurgency in the northern provinces.
• Military advisors were sent to help combat the insurgency.
• The insurgency lasted for several years before peace negotiations began.
• Local support for the insurgency weakened over time.
• Counter-insurgency tactics were employed to restore order.
• The insurgency used hit-and-run attacks against government forces.