Free Derry (Irish: SaorDhoire) was a self-declared autonomous nationalist area of Derry, Northern Ireland, between 1969 and 1972. Its name was taken from a sign painted on a gable wall in the Bogside in January 1969 which read, “You are now entering Free Derry”. The area, which included the Bogside and Creggan neighborhoods, was secured by community activists for the first time on 5 January 1969 following an incursion into the Bogside by members of the police force, the Royal Ulster Constabulary (RUC). Residents built barricades and carried clubs and similar arms to prevent the RUC from entering.
The above paragraph was excerpted from Wikipedia (here)
A documentary about the area of Derry which had a degree of autonomy between 1969 and 1972 after the Battle of the Bogside.
No Go: Free Derry (Part 1)
No Go: Free Derry (Part 2)