Cahokia, Chaco canyon is the important ancient anasazi Indian center in new Mexico that included a pueblo of six hundred interconnected rooms.
Before Columbus, Cahokia was the biggest city that has ever been built north of Mexico and it had 120 clay mounds. Many of them were huge pyramids with flat tops and square bottoms that served as the homes of local officials. The 100-foot Monks Mound, the tallest earthwork in Americas, rose at the spacious square in the middle of the city.
Farmers in the area of the large urban center raised food to feed the inhabitants of the city, who included not only officials from the government and religious leaders but also skilled tradespeople, artisans, and even astronomers. A trading network connecting the city to other societies spread throughout much of North America was centered there. In short, Cahokia was one of prehistoric America's most well developed civilizations.
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Black death (bubonic plague) 1346-1353
The answer is Attila the Hun
