The document summarizes the key events that led to the shootings at Kent State University on May 4, 1970. It describes how students were protesting the announcement that the US would attack Cambodia. The National Guard was called in and clashes erupted between students and guardsmen. During one confrontation, the National Guard opened fire on students, killing four and injuring nine. While survivors claim the guardsmen were ordered to shoot, the guardsmen say they fired in self-defense after believed sniper shots.