The Proud Boys is an exclusively male North American far-right, neo-fascist militant organization that promotes and engages in political violence. The group's leaders have been convicted of violently opposing the United States government, including the constitutionally prescribed transfer of presidential power. It has been called a street gang and was designated as a terrorist group in Canada and New Zealand. The Proud Boys are known for their opposition to left-wing and progressive groups and for their support of former U.S. President Donald Trump. While Proud Boys leadership has denied being a white supremacist organization, the group and some of its members have been connected to white supremacist events, ideologies, and other white power groups throughout its existence.

On January 6, 2021, the United States Capitol Building in Washington, D.C., was attacked by a mob of supporters of then-U.S. president Donald Trump, two months after his defeat in the 2020 presidential election. They sought to keep Trump in power by occupying the Capitol and preventing a joint session of Congress counting the Electoral College votes to formalize the victory of President-elect Joe Biden. The attack was ultimately unsuccessful in preventing the certification of the election results. According to the bipartisan House select committee that investigated the incident, the attack was the culmination of a seven-part plan by Trump to overturn the election. Within 36 hours, five people died: one was shot by Capitol Police, another died of a drug overdose, and three died of natural causes, including a police officer. Many people were injured, including 174 police officers. Four officers who responded to the attack died by suicide within seven months. Damages caused by attackers exceeded $2.7 million.