The high-water mark of student protest against the war in Vietnam took place when armed forces within the United States fired upon student protesters at different universities in the United States. Which universities were the infamous sites of these violent confrontations during Nixon's first administration?

Answer: these universities were Kent state and Jackson state.

Explanation:

Kent state university is a research public university in the state of Ohio.

Jackson state university is a traditionally black university in the state of Mississippi. It is considered a research university.

Armed forces fired upon students in the universities mentioned before.