Pre-Columbian Bolivia covers the historical period between 10,000 BCE, when the Upper Andes region was first populated and 1532, when Spanish conquistadors invaded Inca empire. The Andes region of Pre-Columbian South America was dominated by the Tiwanaku civilization until about 1200, when the regional kingdoms of the Aymara emerged as the most powerful of the ethnic groups living in the densely populated region surrounding Lake Titicaca. Power struggles continued until 1450, when the Incas incorporated upper Bolivia into their growing empire. Based in present-day Peru, the Incas instituted agricultural and mining practices that rivaled those put in place many years later by European conquerors. They also established a strong military force, and centralized political power. Despite their b