Late Flourishing of Cahokia, Mississippian Culture, in the 1120s

Timeline

1. c. 1121–1125Monks Mound · IllinoisSeasonal ceremonies, feasting, and burial activities continued around Monks Mound and the Grand Plaza, indicating that Cahokia's symbolic function as a religious-political center had not yet fully collapsed in the 1120s.
2. c. 1123–1128Lower Mississippi Valley · Mississippi River basinTributes such as maize, shell beads, and stone converged on Cahokia along the Mississippi River and its tributaries, sustaining a regional alliance centered on hereditary chiefly authority and ritual power, though some peripheral settlements had begun to drift away.
3. c. 1126–1130Cahokia settlement area · IllinoisSome archaeological sequences show a slowdown in mound construction and the abandonment or contraction of some residential areas, possibly reflecting environmental stress, resource depletion, or declining political integration, though the 1120s as a whole still belonged to a high-population-density phase.