 In 1804 , fifty years before the city of Omaha was founded , the Lewis and Clark Expedition first arrived via the Missouri River . The 1806 Fort Lisa and 1820 Cabanne 's Trading Post were important fur trading outposts located in proximity to the river , along with earlier Fontenelle 's Post in Bellevue . The Engineer Cantonment was built by Captain Stephen Watts Kearny 's Yellowstone Expedition in 1819 . The Expedition 's craft , the Western Engineer , was the first steamboat to successfully venture up the Missouri River to the Omaha @-@ Council Bluffs area . 
 In 1804 , fifty years before the city of Omaha was founded , the Lewis and Clark Expedition first arrived via the Missouri River . The 1806 Fort Lisa and 1820 Cabanne <a href='null_genetive' title='1'><mark>'s</mark></a>Trading Post <a href='uninflect' title='2'><mark>were</mark></a> important fur trading outposts located in proximity to the river , along with earlier Fontenelle <a href='null_genetive' title='3'><mark>'s</mark></a>Post in Bellevue . The Engineer Cantonment was built by Captain Stephen Watts Kearny <a href='null_genetive' title='4'><mark>'s</mark></a>Yellowstone Expedition in 1819 . The Expedition <a href='null_genetive' title='5'><mark>'s</mark></a>craft , the Western Engineer , was the first steamboat to successfully venture up the Missouri River to the Omaha @-@ Council Bluffs area . 
In 1804 , fifty yrs b4 da city of Omaha was founded , the Lewis and Clark Expedition first arrived via the Missouri River . The 1806 Fort Lisa and 1820 Cabanne  Trading Post was important fur trading outposts located in proximity to tdariver , along with earlier Fontenelle  Post in Bellevue . The Engineer Cantonment was built by Captain Stephen Watts Kearny  Yellowstone Expedition in 1819 . Thdaxpedition  craft , the Western Engineer , was thedarst steamboat to successfully venture up the Missouri River to the daha @-@ Council Bluffs area .