On May 4, 1970, National Guardsmen opened fire on unarmed college students at Kent State University in Ohio, killing four and injuring nine others. The students had been protesting the U.S. invasion of Cambodia during the Vietnam War. The shooting sparked outrage across the nation, leading to widespread protests at other universities. The event became a turning point in the anti-Vietnam War movement and led to increased opposition to the war. The Kent State shooting remains a symbol of government overreach and the struggle for free expression in the U.S.