An insurgency is a movement within a country dedicated to overthrowing the government. An insurgency is a rebellion.
Insurgencies are movements to overthrow governments. The United States was founded by an insurgency, when the colonies fought England for independence. In the Star Wars movies, the rebel forces stage an insurgency. Around the world, many insurgencies exist, using violent and other means. Insurgency is also used for less serious situations: for example, a rebellious group within a company, political party, or school could be called an insurgency. All insurgencies are made up of rebels.