Maize had been a minor crop in…
796 CE to 807 CE
Maize had been a minor crop in the Woodland Period, but many archaeologists believe new varieties of maize were introduced to the region that produced higher yields, allowing for a population boom.
This increase in population, combined with the potential for surplus and growing tensions over control of territory, appears to have led to large nucleated settlements throughout the eastern United States.
Although this manifested itself earliest along the Mississippi south of Iowa, the earliest Late Prehistoric cultures appeared in the western part of the state.