Born on 10 December 1783, Henry Leavenworth enlisted in the army as a Captain just before the War of 1812. In 1819, Col. Henry Leavenworth and the 5th Infantry arrive at Bdote to build what would become Ft. Snelling. A few years later, in 1827, he established a cantonment on the Missouri River which would later become Fort Leavenworth, Kansas.
While leading an expedition against the Pawnee and Comanche Indians in 1834, Leavenworth fell ill and passed away. Shortly before his death he was promoted to brigadier general.