How many weeks did participants with the Poor People's March camp out and occupy the Washington Mall in Washington, D.C. in the summer of 1968?

The Poor People's Campaign or Poor People's March on Washington, D.C. was a 1968 effort to gain economic justice for poor people in the United States. It was organized by Martin Luther King Jr. and the Southern Christian Leadership Conference (SCLC) and carried out under the leadership of Ralph Abernathy in the wake of King's assassination.

After presenting an organized set of demands to Congress and executive agencies, participants set up a 3,000-person protest camp on the Washington Mall, where they stayed for six weeks from May 12th to June 24th. On May 21st, thousands of poor people set up a shantytown known as 'Resurrection City'. The city had its own zip code, 20013. The camp suffered from the mud produced by continual rain, which at one point created standing water 5 inches deep.

On June 20th, police fired several canisters of tear gas into the city, reportedly after members of the Milwaukee National Association for the Advancement of Colored People (NAACP) provoked them by throwing rocks.

The demonstration's National Park Service permit expired on June 23rd. The following day, 1,000 police officers arrived to clear the camp and its 500 remaining residents. In the camp police found some people singing and clapping. A search of camp's shelters resulted in the arrest of some people. The area was sealed off, a curfew was declared and the mayor declared a state of emergency.