May 22, 1807: The duel with Hamilton wasn't the end of Burr's story (more) Today in History—May 22: Aaron Burr’s Treason Trial Begins Written by Michele Metych Michele Metych is the lead editor for Today in History at Encyclopædia Britannica. Michele Metych Fact-checked by Britannica Editors Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Britannica Editors Last updated May 19, 2026 •History On this day in 1807, Aaron Burr went on trial for treason in what the press called “the trial of the century” (an ambitious label with 93 years left to go). Today in History is a daily newsletter from Britannica. Encyclopædia Britannica, Inc. Want to learn more about what happened on May 22, or any other day of the year? Sign up to receive the newsletter in your inbox every morning. This was not the...

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