The Omaha establish villages near what is…
1856 CE
Semi-permanent Omaha villages last from eight to fifteen years.
They create sod houses for winter dwellings, which are arranged in a large circle in the order of the five clans or gentes of each moiety, to keep the balance between the Sky and Earth parts of the tribe.
Eventually, disease and Sioux aggression from the north had forced the tribe to move south.