In the 1960s and 1970s, the United States fought a war in Vietnam in order to

The USA became involved in Vietnam because it feared the spread of communism

Explanation:

the supreme court plays a big role in government. the constitution gives them ability to check the president and the congresses actions and dictate if their actions are allowed by the constitution or not.

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the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances