An insurgency is a violent attempt to oppose a country's government carried out by citizens of that country. He has led a violent armed insurgency for 15 years. = uprising, insurrection. insurgencies an attempt by a group of people to take control of their government using force and violence = rebellion counterinsurgency
Subversive political activity, civil rebellion, revolt, or insurrection designed to weaken and overthrow a duly constituted authority by its own people