The Pentagon protests were significant anti-war demonstrations that took place in the 1960s, primarily in 1967 and 1968, aimed at opposing U.S. involvement in the Vietnam War. These protests symbolized the growing dissent among American citizens, particularly students and activists, against military action and government policies, often characterized by large gatherings and confrontational tactics, including the notable event where protesters attempted to 'levitate' the Pentagon as a form of political statement.