An archaeological site in southwestern Colorado (site reference 5MT765) dating to approximately 1280 CE, near the end of Ancestral Puebloan occupation of the Mesa Verde region. Sand Canyon Pueblo was one of the largest cliff-edge pueblos in the region, with approximately 420 rooms housing an estimated 400–500 people. Excavations revealed multiple unburied human remains in burned structures, showing the site was violently attacked and then abandoned during the great 13th-century drought-driven exodus from the Four Corners region. Skeletal remains show perimortem trauma consistent with violent death.
Indigenous peoples had inhabited North America for at least 15,000 years before European contact, developing complex societies across every region of the continent. The Mississippian culture, centered on the city of Cahokia near present-day St. Louis, reached its peak around 1100 AD with a population estimated at 10,000 to 20,000 — larger than contemporary London. The Ancestral Puebloans built multi-story stone complexes at Chaco Canyon and Mesa Verde between the 9th and 13th centuries. The Iroquois Confederacy, formed between roughly 1450 and 1600, united five nations under a constitution that influenced later American democratic thinking. Across the eastern woodlands, the Great Plains, the Pacific Coast, and the Southwest, hundreds of distinct nations maintained sophisticated trade networks, agricultural systems, and governance structures. European contact beginning in the late 15th century introduced epidemic disease — smallpox, measles, influenza — which devastated Indigenous populations by an estimated 50 to 90 percent within a century.
{"unburied_remains":12,"estimated_community_size":450}
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