The Vietnam War took place.
The Paris Peace Accords , officially titled the Agreement on Ending the War and Restoring Peace in Vietnam , was a peace treaty signed on January 27 , 1973 to establish peace in Vietnam and end the Vietnam War . The role of the United States in the Vietnam War began after World War II and escalated into full commitment during the Vietnam War from 1955 to 1975 . Vietnam War . The North Vietnamese army was supported by the Soviet Union , China and other communist allies and the South Vietnamese army was supported by the United States , South Korea , Australia , Thailand and other anti-communist allies .