On May 4, 1970, 28 National Guardsmen fired on a group of antiwar demonstrators on the Kent State University campus in Kent, Ohio. Four students died, and nine were wounded. The National Guard was called to campus two days earlier to bring calm to the student outrage over Vietnam and the U.S. invasion of Cambodia. In 1974, a federal court dropped all charges levied against eight Ohio National Guardsmen for their role in the students’ deaths.