Answer :
The primary reason given by US leaders to justify military involvement in Vietnam was that it would keep communism from spreading throughout the region.
What is communism?
Communism refers to those economic theories that boosts a classless society in which all property and wealth is owned together rather than separately.
The main justification stated by US authorities for military intervention in Vietnam was to prevent communism from spreading throughout the region.
Therefore, the primary reason given by US leaders to justify military involvement in Vietnam was the communism.
Learn more about the communism, refer to:
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