Protests: Vietnam, Okinawa and injustice over the years

This was basic riot tactics training for the military in the1960s. My unit, which ran the USMC data center resupplying the units in Vietnam, was learning how to advance into the Okinawan rioters to force them back in case they breached the gates of our base. our goal was to not shoot anyone, but deliver a “horizontal or vertical butt stroke” to the opponents chest or head if they attacked us (graphics).