evidence: - Duignan, Brian (August 4, 2021). "January 6 U.S. Capitol attack". Encyclopædia Britannica. Archived from the original on January 17, 2023. Retrieved September 22, 2021. [...] - Holpuch, Amanda (January 6, 2021). "US Capitol's last breach was more than 200 years ago". The Guardian. Archived from the original on January 11, 2021. Retrieved January 24, 2021. [...] The attack, which some historians called the most severe assault on the Capitol since the British sacked the building in 1814 - Holpuch, Amanda (January 6, 2021). "US Capitol's last breach was more than 200 years ago". The Guardian. Archived from the original on January 11, 2021. Retrieved January 24, 2021.