WASHINGTON (AP) — President Donald Trump has pardoned, commuted the prison sentences or vowed to dismiss the cases of all of the 1,500-plus people charged with crimes in the Jan. 6, 2021, U.S. Capitol riot, including people convicted of assaulting police officers, using his clemency powers on his first day back in office to undo the massive prosecution of the unprecedented assault on the seat of American democracy.

Trump’s action, just hours after his return to the White House on Monday, paves the way for the release from prison of people found guilty of violent attacks on police, as well as leaders of far-right extremist groups convicted of failed plots to keep the Republican in power after he lost the 2020 presidential election to Democrat Joe Biden.

The pardons are a culmination of Trump’s yearslong campaign to rewrite the history of the Jan. 6 attack, which left more than 100 police officers injured as the angry mob of Trump supporters — some armed with poles, bats and bear spray — overwhelmed law enforcement, shattered windows and sent lawmakers and aides running into hiding. While pardons were expected, the speed and the scope of the clemency amounted to a stunning dismantling of the Justice Department’s effort to hold participants accountable.

Trump also ordered the attorney general to seek the dismissal of roughly 450 cases that are pending before judges stemming from the largest investigation in Justice Department history.