The Spring Mobilization Committee to End the War in Vietnam, which became the National Mobilization Committee to End the War in Vietnam, was a coalition of antiwar activists formed in 1967 to organize large demonstrations in opposition to the Vietnam War. The organizations were informally known as "the Mobe".
On April 15, 1967, the Spring Mobilization's massive march against the Vietnam War from Central Park to the United Nations attracted hundreds of thousands of people, including Dr. Martin Luther King, Jr., Harry Belafonte, James Bevel, and Dr. Benjamin Spock, who marched and spoke at the event. During the event many draft cards were burned, according to the New York Times. A simultaneous march in San Francisco was attended by Coretta Scott King.
At the New York march its last speaker, James Bevel, the Spring Mobilization's chairman and initiator of the march on the U.N. (until Bevel came aboard at the invitation of A. J. Muste and David Dellinger the plan was for just an April 15 rally in Central Park), made an impromptu announcement that the next major anti-war gathering would be in Washington D.C.
Bevel's announcement brought about the Spring Mobilization Conference, a gathering of 700 antiwar activists held in Washington D.C. May 20–21, 1967, called to evaluate April's massive antiwar demonstrations. It was organized to chart a future course for the antiwar movement, and set another large antiwar action for the fall of 1967 and created an administrative committee - the National Mobilization Committee to End the War in Vietnam - to plan it.
The Mobe then planned and organized a large demonstration for Washington D.C. on October 21, 1967. This demonstration was a rally at West Potomac Park near the Lincoln Memorial and a march to the Pentagon, where another rally would be held in a parking lot, followed by civil disobedience on the steps of the Pentagon itself. The action was known as the "March on the Pentagon."