Oath Keepers

The Oath Keepers are an American far-right and anti-government militia organization. They are made of military, police and first responders. They pledge to fulfill an oath that all military and police take in order to "defend the Consitution against all enemies, foreign and domestic". It encourages its members to go against orders which would violate the United States Constitution. The Anti-Defamation League (ADL) has estimated the group's membership at several thousand.
Several organizations that monitor domestic terrorism in the United States and hate groups call the Oath Keepers extremist or radical. The FBI describes the Oath Keepers as a "paramilitary" organization. They also say the Oath Keepers are "a large and loosely organized collection of militia who believe that the federal government has been coopted by a shadowy conspiracy that is trying to strip American citizens of their rights".
The Oath Keepers were present and wearing combat uniforms in Ferguson, Missouri during the 2014 and 2015 unrest in the city. Members of the group were indicted on conspiracy charges for staging a planned mission during the 2021 storming of the United States Capitol.
Elmer Stewart Rhodes founded the Oath Keepers in March 2009. The Southern Poverty Law Center lists Rhodes as an extremist.