CHRONOLOGY

• – Nixon orders invasion of Cambodia.
• – Students are killed at Kent State and Jackson State.

• – Portions of Pentagon Papers are published.

• – Nixon visits China.
• – Nixon signs arms limitation treaties with Soviets.

• – Paris Peace Accords.
• – CIA-backed military coup in Chile.
• – Arab oil embargo following Yom Kippur War.

• – North Vietnam takes over South Vietnam, ending the war.
• – Helsinki accords.