Greensboro sit-ins

Wikipedia - "The Greensboro sit-ins were a series of nonviolent protests in Greensboro, North Carolina, in 1960, which led to the Woolworth department store chain removing its policy of racial segregation in the Southern United States. While not the first sit-in of the Civil Rights Movement, the Greensboro sit-ins were an instrumental action, and also the most well-known sit-ins of the Civil Rights Movement. These sit-ins led to increased national sentiment at a crucial period in US history. The primary event took place at the Greensboro, North Carolina, Woolworth store, now the International Civil Rights Center and Museum. ..."
Wikipedia
History: The Greensboro Sit-In
The Greensboro Chronology
Awesome: Greensboro Four - Woolworth Lunch Counter