The Moratorium to End the War in Vietnam was a massive demonstration and teach-in across the United States against the United States involvement in the Vietnam War. It took place on October 15, 1969, followed a month later by a large Moratorium March on Washington.
The Moratorium developed from Jerome Grossman's April 20, 1969, call for a general strike if the war had not concluded by October. David Hawk and Sam Brown, who had previously worked on the unsuccessful 1968 presidential campaign of Eugene McCarthy, changed the concept to a less radical moratorium and began to organize the event as the Vietnam Moratorium Committee with David Mixner, Marge Sklenkar, John Gage, and others.
As with previous large anti-war demonstrations, including the National Mobilization Committee to End the War in Vietnam's April 15, 1967 march on the United Nations and their 1967 March on the Pentagon, the event was a clear success, with millions participating throughout the world. Boston was the site of the largest turnout; about 100,000 attended a speech by anti-war Senator George McGovern. Future U.S. President Bill Clinton, then a Rhodes Scholar at Oxford, organized and participated in the demonstration in England; this later became an issue in his Presidential campaign.
In New York City, the day marked Game 4 of the 1969 World Series and included controversy as Mayor John Lindsay wanted the US flag to be flown at half-staff, however Baseball Commissioner Bowie Kuhn overruled the mayor and ordered the flag to be flown at full staff. Also, Mets Game 4 Starter Tom Seaver had his face on some anti-Moratorium Day literature distributed before the game. Seaver claimed that his picture was used without his knowledge or approval. The Mets won that day's game in 10 innings and would go on to win the Series the next day.