[66] Jackson, safe from arrest because of his extensive paper trail, organized the militia to capture the conspirators.[71] Jackson testified before a grand jury at Burr's trial in 1807, implying that it was Burr's associate James Wilkinson who was guilty of treason, not Burr. Burr was acquitted of the charges.[72]

Military career
Military campaigns of Andrew JacksonGeneral Andrew Jackson by John Wesley Jarvis, (c. 1819, Metropolitan Museum of Art, New York)

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War of 1812
Creek War
Main article: Creek War
On June 18, 1812, the United States declared war on the United Kingdom.[73] Though the causes of the War of 1812 were primarily about maritime issues,[74] the war provided the white settlers on the southern frontier the opportunity to overcome Native American resistance to settlement, undermine British support of the Native American tribes,[75] and pry Florida from the Spanish.[76]
Jackson immediately offered to raise volunteers for the war, but he was not called to duty until after the United States military was repeatedly defeated in the American Northwest. 