In August 1806, Aaron Burr began the final preparations for his mysterious expedition to the western frontier. As he traveled, rumors that he was plotting a dangerous conspiracy followed in his wake. Newspapers reported that Burr was planning to invade Mexico and start a secessionist rebellion in New Orleans. As evidence mounted, a dogged federal prosecutor resolved to bring Burr into court. But the biggest threat to Burr’s vision of power and glory would soon come from someone he never expected – one of his closest allies. Listen ad free with Wondery+. Join Wondery+ for exclusives, binges, early access, and ad free listening. Available in the Wondery App. https://wondery.app.link/historytellers Support us by supporting our sponsors! See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.