The Kent State shootings, also known as the May 4 massacre and the Kent State massacre, were the killings of four and wounding of nine other unarmed Kent State University students by the Ohio National Guard on May 4, 1970 in Kent, Ohio, 40 miles south of Cleveland. The killings took place during a peace rally opposing the expanding involvement of the Vietnam War into neutral Cambodia by United States military forces as well as protesting the National Guard presence on campus. The incident marked the first time that a student had been killed in an anti-war gathering in United States history.