Rebellion, uprising, or insurrection is a refusal of obedience or order. It may, therefore, be seen as encompassing a range of behaviors aimed at destroying or taking over the position of an established authority such as a government, governor, president, political leader, financial institution or boss. The methods can be peaceful, such as civil disobedience, civil resistance and nonviolent resistance, or violent, such as terrorism, sabotage and guerrila warfare. Those who participate in rebellions, especially if they are armed, are known as "rebels".