Ok so I was in grade school in the early 70’s and HS mid to late -70’s. One of my teachers taught me in 5th grade, and then later taught at my HS. He taught history both times. I don’t remember which branch of the military he served in, but he served in the Philippines. His wife was Filipino. Nicest guy. He was not a revolutionary in any way, at least, not that I could discern. He was very by the book, and pretty conservative. I mention only because he didn’t fit the bill as described.
Kent State shooting was in 1970
1971 saw millions protesting against the war
Bombings across the country in the early 1970’s by the Weathermen and other groups
Jane Fonda went to Vietnam in 1972