Military Service
- 1829-32
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- As second lieutenant, serves at various posts in Missouri, Illinois, and in Iowa and Wisconsin Territories
- 1832
August-September - Escorts Chief Black Hawk from Wisconsin to St. Louis (there is no evidence that Davis actually fought in the Black Hawk War)
- 1833-35
- On recruiting duty; assigned to 1st Dragoons and promoted to first lieutenant; serves in Indian Territory
- 1835
- February 19
- Acquitted in court-martial on charge of bad conduct
- May 12
- Resignation from army officially forwarded to headquarters
- June 17
- Marries Sarah Knox Taylor (daughter of Zachary Taylor) near Louisville, Kentucky; leaves with bride for Mississippi (see also Davis' letter to Sarah, Dec. 12, 1834)
- September 15
- Sarah Knox Taylor Davis dies at Locust Grove plantation near Bayou Sara, Louisiana; Davis seriously ill
- Winter
- Travels to Havana, Cuba, to recover health; returns via New York and Washington