During the early 1970s, two sit-in protests at the university led to a response from law enforcement officers. On May 5, 1970, a protest over the Vietnam War and the Kent State massacre occupied the Student Union Building. The National Guard was ordered to sweep the building and arrest those inside; eleven students and journalists were bayonetted when those outside did not hear the order to disperse given inside. On May 10, 1972, a peaceful sit-in protest near Kirtland Air Force Base led to the arrest of thirty-five people and was pushed back to UNM, leading to eight more arrests. The following day, tear gas was used against hundreds of demonstrators on campus and the situation continued to deteriorate, leading to the university to declare a state of emergency.