Chicano Moratorium against the Vietnam War, East Los Angeles, California. Police riot kills three people, including journalist Rubén Salazar.

The Chicano Moratorium, formally known as the National Chicano Moratorium Committee Against The Vietnam War, was a movement of Chicano anti-war activists that built a broad-based coalition of Mexican-American groups to organize opposition to the Vietnam War. Led by activists from local colleges and members of the Brown Berets, a group with roots in the high school student movement that staged walkouts in 1968, the coalition peaked with an August 29, 1970 march in East Los Angeles that drew 30,000 demonstrators. The march was described by scholar Lorena Oropeza as "one of the largest assemblages of Mexican Americans ever." It was the largest anti-war action taken by any single ethnic group in the USA. It was second in size only to the massive U.S. immigration reform protests of 2006.

The Vietnam War was an armed conflict in Vietnam, Laos, and Cambodia fought between North Vietnam and South Vietnam and their allies. North Vietnam was supported by the Soviet Union and China, while South Vietnam was supported by the United States and other anti-communist nations. The conflict was the second of the Indochina wars and a proxy war of the Cold War between the Soviet Union and US. The Vietnam War was one of the postcolonial wars of national liberation, a theater in the Cold War, and a civil war, with civil warfare a defining feature from the outset. Direct US military involvement escalated from 1965 until its withdrawal in 1973. The fighting spilled into the Laotian and Cambodian Civil Wars, which ended with all three countries becoming communist in 1975.

East Los Angeles, or East L.A., is an unincorporated community and census designated place (CDP) situated within Los Angeles County, California, United States. According to the United States Census Bureau, East Los Angeles is designated as a census-designated place (CDP) for statistical purposes. The most recent data from the 2020 census reports a population of 118,786, reflecting a 6.1% decrease compared to the 2010 population of 126,496.