Answer:
Bombing
Step-by-step explanation:
The Kent State incident in 1970, Unarmed students were protesting against the bombing carried out by the United States military forces in neutral Cambodia.
The incident which is also refer to as May 4 massacre or the Kent State massacre occurred on May 4,1970, when the Unarmed students of Kent State University in Kent, Ohio were shot by the Ohio National Guard during a mass protest by the Unarmed students against U.S military forces bombing.
Within 13 seconds, up to 67 rounds were fired by twenty eight National Guard soldiers killing four students and wounded nine others.