What Is 2021 United States Capitol attack

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Last updated: April 15, 2026

Quick Answer: The January 6, 2021, United States Capitol attack occurred when a mob of pro-Trump supporters stormed the U.S. Capitol Building in Washington, D.C., disrupting the certification of Joe Biden’s presidential election victory. Over 1,500 people were arrested in connection with the attack, which resulted in multiple deaths and injuries.

Key Facts

On January 6, 2021, a mob of ~2,000-5,000 people attacked the U.S. Capitol
The attack disrupted the certification of Joe Biden’s 306 electoral votes
5 people died directly or indirectly during the event, including a Capitol Police officer
More than 1,500 individuals have been investigated, with over 800 charged
The House Select Committee held 10 public hearings from June to October 2022

Overview

The January 6, 2021, United States Capitol attack was a violent breach of the U.S. Capitol Building by supporters of then-President Donald Trump. The assault occurred during a joint session of Congress convened to formally count and certify the Electoral College votes from the 2020 presidential election.

Organized in part through social media and fueled by false claims of election fraud, the attack temporarily halted the certification process. Lawmakers, staff, and Vice President Mike Pence were evacuated from the chamber as rioters roamed the halls, vandalized offices, and clashed with police.

January 6, 2021: The attack unfolded during the congressional certification of the 2020 election results, a normally ceremonial process.
2,000–5,000 participants: Estimates suggest several thousand pro-Trump demonstrators stormed the Capitol grounds and building.
306 electoral votes: The count being certified confirmed Joe Biden’s victory over Donald Trump in the Electoral College.
5 deaths: Including one Capitol Police officer, Brian Sicknick, who died the day after the attack due to injuries sustained during the riot.
Over 1,500 investigations: The FBI opened hundreds of investigations, leading to more than 800 criminal charges by 2023.

How It Works

The Capitol attack was not a spontaneous event but the culmination of weeks of rhetoric and organizing by Trump allies and extremist groups. Rallies in Washington, D.C., were promoted online as "Stop the Steal" protests, falsely claiming widespread voter fraud in the 2020 election.

Stop the Steal Rally: Held on January 6, 2021, near the White House, it drew thousands before the march to the Capitol. The rally featured speeches by Trump, Rudy Giuliani, and other allies.
Capitol Breach: At approximately 2:15 p.m., rioters broke through police barricades and entered the Capitol, overwhelming law enforcement. The building was declared secure around 8 p.m.
Law Enforcement Response: Over 140 police officers were injured during the attack, with many reporting physical assaults and use of chemical sprays.
House Select Committee: Formed in June 2021, the committee conducted a year-long investigation and released a 800-page report detailing Trump’s role in the events.
Legal Consequences: As of 2024, over 800 individuals have been charged with crimes ranging from trespassing to seditious conspiracy.
Media Coverage: The attack was broadcast live on national and international networks, with footage later used as evidence in court proceedings.

Comparison at a Glance

Comparing the 2021 Capitol attack to other U.S. political events highlights its unprecedented nature in modern history.

Event	Date	Location	Deaths	Arrests
2021 Capitol Attack	January 6, 2021	U.S. Capitol, Washington, D.C.	5	800+
1968 Chicago Riot	August 28–30, 1968	Chicago, IL	0	~1,000
1932 Bonus Army March	July 28, 1932	Washington, D.C.	2	0
1919 May Day Riots	May 1, 1919	Cleveland, OH	2	~100
2020 George Floyd Protests	May–June 2020	Nationwide	19	14,000+

While civil unrest has occurred during other political events, the 2021 attack was unique in that it targeted the U.S. legislative branch during a constitutional process. Unlike protests over civil rights or police brutality, this event was aimed at overturning a democratic election, making it a significant moment in U.S. political history.

Why It Matters

The Capitol attack raised serious concerns about domestic extremism, election integrity, and the stability of American democracy. It prompted reforms in Capitol security and led to broader discussions about misinformation and political violence.

Security Overhaul: The U.S. Capitol Police implemented new protocols and received increased funding after being criticized for poor preparedness.
Trump’s Second Impeachment: The House impeached Trump for incitement of insurrection, making him the only U.S. president impeached twice.
Domestic Terrorism: The FBI classified some participants as domestic terrorists, highlighting the threat of far-right extremism.
Public Trust: A 2022 Pew Research study found that only 40% of Americans trusted the federal government to do what is right.
Legal Precedent: Prosecutions for seditious conspiracy, such as those against Oath Keepers and Proud Boys, set new legal benchmarks.
Global Impact: The attack was widely condemned internationally and damaged perceptions of U.S. democratic leadership.

The January 6 attack remains a pivotal moment in U.S. history, symbolizing both the fragility of democratic institutions and the consequences of political disinformation. Ongoing investigations and public discourse continue to shape its legacy.