What caused the decline of the Aztec empire? A. civil wars among leaders
B. invasion by the conquistador Cortes
C. expansion of the empire left the defense of the borders weak
D. the gods became angry because there was not enough sacrifices

the results of roman expansion produced social conflict and civil war. julius caesar gained power and became a dictator but was then assassinated. the reign of augustus began a long period of imperial rule and peace in the roman empire. rome faced the problems of how to maintain peace, law, and order.

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north atlantic treaty organization.