The opposition to the War in Vietnam that began in the 1960s grew exponentially during the early 1970s . One of the best-known anti-war demonstrations was the Kent State shootings . In 1970 , university students were protesting the war and the draft . Riots ensued during the weekend and the National Guard was called in to maintain the peace . However , by 4 May 1970 , tensions arose again , and as the crowd grew larger , the National Guard started shooting . Four students were killed and nine injured . This event caused disbelief and shock throughout the country and became a staple of anti-Vietnam demonstrations
Kent State shootings
Kent State shootings
1970s