The korean war and vietnam war was fought to contain

the spread of communism

Explanation:

the korean and Vietnam war were primarily faught because the united states and the rest of its allies knew that if they didn't contain communism then it would result in another world war

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.