Oath Keepers is an American far-right anti-government militia whose leaders have been convicted of violently opposing the government of the United States, including the transfer of presidential power as prescribed by the United States constitution. It was incorporated in 2009 by founder Elmer Stewart Rhodes, a lawyer and former paratrooper. In 2023, Rhodes was sentenced to 18 years for seditious conspiracy for his role in the January 6 United States Capitol attack, and another Oath Keepers leader, Kelly Meggs, was sentenced to 12 years for the same crime. Three other members have pleaded guilty to this crime, and four other members have been convicted of it.

American militia movement is a term used by law enforcement and security analysts to refer to a number of private organizations that include paramilitary or similar elements. These groups may refer to themselves as militia, unorganized militia, and constitutional militia. While groups such as the Posse Comitatus existed as early as the 1980s, the movement gained momentum after standoffs with government agents in the early 1990s. By the mid-1990s, such groups were active in all 50 US states, with membership estimated at between 20,000 and 60,000. The movement is most closely associated with the American right-wing.