Poor People's March On Washington

Poor People's March at Lafayette Park and on Connecticut Avenue, Washington, D.C.. Photo: Wikipedia

First organized by Rev. Dr. Martin Luther King, the Poor People's Campaign was re-organized after King's assassination, and took place in Washington D.C.  

The campaign included the erection of a protest encampment, called "Resurrection City," which eventually reached some 3,000 tents on the set up on the National Mall.

Photo:  National Park Service/Museum Resource Center

An estimated 7000 to 8000 people turned out for the March and rally on June 19th, a much smaller figure than King had planned for.   This may have been influenced not only by King's death, but by the 20,000 troops on-hand to suppress any action that the government disapproved of.

Sources:

Resurrection City, an Overlooked Protest of the 1960s Turns 50,  by Rick Massimo, WTOP (18 May 2018)

Wikipedia