History Washington County is in eastern Nebraska on the Missouri River. It was explored by Europeans as early as 1739 by Pierre Antoine and Paul Mallet, who were on a trapping expedition to Canada. In 1804, Lewis and Clark reported the establishment of the new United States government to a council of Indian chiefs near the present site of Fort Calhoun. As a result of this council, Fort Atkinson was established in 1819 and served as a key midwestern outpost until 1827.
History Washington County is in eastern Nebraska on the Missouri River. It was explored by Europeans as early as 1739 by Pierre Antoine and Paul Mallet, who were on a trapping expedition to Canada In 1804, Lewis and Clark reported the establishment of the new United States government to a council of Indian chiefs near the present site of Fort Calhoun. As a result of this council, Fort Atkinson was established in 1819 and served as a key midwestern outpost until 1827.