Unlike during previous incursions, Bogsiders were ready. Existing barricades were strengthened and new ones erected. Stockpiles of petrol bombs and stones were brought forward.

Over three days and two nights of fighting, the Bogside held the barricades. The area had effectively seceded from the northern state. Free Derry was reborn. Hundreds of young defenders, with the active backing of the entire community, secured the perimeter of the area and the commanding heights of the roof of the Rossville Flats. Bricks and petrol bombs battled against batons, guns and armoured vehicles. Police fired more than 1,000 CS gas canisters into the area. 

On 14 August, the Bogsiders pushed an exhausted police back towards the city centre. At the same time, B Specials could be seen mobilising behind police lines. 

At 4.00pm on 14 August, as Derry prepared for confrontation between the Bogside and the B Specials, soldiers of the Prince of Wales Regiment were deployed around the area.