Feudalism emerged as a result of the decentralization of the European empire. This was a system for structuring society around relationships derived from the<span>holding of land in exchange of service or labour.</span>
August 2, 1990 through February 28, 1991
The Incan civil war weakened the empire exhausting its resources and killing its fighters, thus leaving the door open to conquest by the Spanish
With their far greater numbers, they might have repelled the European forces meaning that they could have retained control of the continent
Hopes this helps:
Answer: General Longstreet.