Which was the last empire to flourish in South America prior to the Spanish invasion?

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The Inka Empire was the last empire to flourish in South America prior to the Spanish invasion. They ruled over a vast territory that included parts of modern-day Peru, Bolivia, Chile, Ecuador, Colombia, and Argentina. The Inka Empire was known for its impressive engineering feats, such as the construction of Machu Picchu and the extensive road network known as the Inka Trail.

Which Was the Last Empire to Flourish in South America