A series of protests against the United States' involvement in the Vietnam War took place prior to and during the 1968 Democratic National Convention in Chicago, Illinois. The protests lasted approximately seven days, from August 23 to August 29, 1968, and drew an estimated 7,000 to 10,000 anti-war protesters in total.
In the weeks after the 1967 March on the Pentagon, many left-wing counterculture and anti-Vietnam War groups, as well as supporters of anti-war Democratic presidential candidate Eugene McCarthy, began planning demonstrations in response to the Democratic National Convention and the impending presidential nomination of Democratic nominee, Vice President Hubert Humphrey. Chicago authorities attempted to prevent the protests from occurring but were unsuccessful, and the city promised "law and order" to suppress the protesters.