In 1813 Bonneville received an appointment to the
United States Military Academy at
West Point,
New York. He graduated after only two years, receiving a commission as
brevet second lieutenant of light artillery. In his early career, he served at posts in
New England,
Mississippi, and at
Fort Smith in the
Arkansas Territory. In 1824, he was taken to
Fort Gibson in the
Indian Territory and promoted to
captain. While traveling to France, he was a guest of
General Lafayette. After returning from France, he was transferred in 1828 to
Jefferson Barracks in
Missouri. While in Missouri, Bonneville was inspired by the writing of
Hall J. Kelley, as well as editorials in the
St. Louis Enquirer (edited at the time by
Thomas Hart Benton) to join in the exploration of the American West. Bonneville met with Kelley, who was impressed by him and appointed him to lead one of the expeditions to the
Oregon Country; it was scheduled to leave in early 1832. The lack of volunteers for the expedition forced the delay and eventual cancellation of the expedition, leaving Bonneville unrequited in his ambitions. To pursue his desire to explore the west, he petitioned General
Alexander Macomb for a leave of absence from the military, arguing that he would be able to perform valuable reconnaissance among the
Native Americans in the Oregon Country, which at the time was under a precarious joint occupation of the U.S. and
Britain. It was largely controlled by the
Hudson's Bay Company. Macomb granted his request, a 26-month leave running from August 1831 to October 1833, and instructed him to gather all information that might be useful to the government. In particular, he was to pose as a
fur trader and find out the natural history of the region, its climates, soils, geography, topography, mineral production, geology, and the character of the local tribes. Expenses for his exploration were paid by private donors, including Astorian Alfred Seton and possibly
John Jacob Astor. ==Marriage and family==