On June 28, 1969, New York City police arrived at the Stonewall Inn, a bar in Greenwhich village that catered to the gay community, to conduct a routine raid and arrest any individuals found to be cross-dressing. The raid did not proceed routinely, and resulted in resistance and demonstrations by the bar's patrons and other individuals who gathered around the scene. The Stonewall riots are considered to be a spark that ignited the gay rights movement.
Poster from justseeds: http://bit.ly/1ctZXQl
Image is of Sylvia Ray Rivera, a Puerto Rican and Venezuelan transwoman
from New York City, a civil rights activist involved with the Young Lords Party and Black Panthers, who took part in the Stonewall Riot in 1969, and was a founding member of the Gay Liberation Front.