During which period did the Cahokia civilization flourish?

The Cahokia civilization, known for its impressive earthworks and large, complex society, flourished primarily between 800 and 1100 C.E. This period is characterized by the emergence of significant urban centers and large earthen mounds in the Mississippi River Valley, with Cahokia itself becoming one of the most influential cities in pre-Columbian North America.

During its peak, Cahokia was notable for its extensive trade networks, monumental architecture, and a highly organized society. The civilization developed advanced agricultural techniques, which supported a large population and allowed for social stratification and the construction of ceremonial mounds, including the famous Monk's Mound. Understanding this period is crucial for recognizing the cultural and technological advancements made by indigenous peoples in North America prior to European contact.

The other timeframes provided do not accurately capture the height of the Cahokia civilization's influence and development.