April 24, 1971:
More than 175,000 people march in Washington, reaching the steps of the Capitol, to demand an end to the war in Vietnam. The crowd includes several members of Congress, but none of the prospective presidential candidates for 1972.
It is believed to be the largest rally ever held at the Capitol.
On the same day, in San Francisco, 150,000 march for the same cause. The rallies were sponsored by the National Peace Action Coalition.
Two days earlier, also at the Capitol, John Kerry of Vietnam Veterans Against the War testifies before the Senate Foreign Relations Committee.
Today in Campaign History is a daily feature on Political Junkie.