found: Work cat.: 2007630076: Plan of Fort Atkinson, 1819.
found: GNIS Aug. 10, 2007(Fort Atkinson (historical); established in 1819 by the Yellowstone Expedition as the first U.S. military post west of the Missouri River, named for Col. Henry Atkinson, operated as a fort 1820 to 1827; located 9 mi N of Omaha, E of Fort Calhoun; variants: Camp Council Bluff, Cantonment Council Bluffs)
found: Encyc. hist. forts, 1988:p. 481 (Fort Atkinson; variants, Camp Missouri, Cantonment Missouri, Cantonment Council Bluffs; established Sept. 29, 1819; abandoned June 6, 1827)