Rioting on the day of the Apprentice Boys parade in Derry resulted in clashes between residents of the Bogside and the RUC.
Barricades were erected and stones and petrol bombs thrown to keep the RUC out of the Bogside. Rioting spread across Northern Ireland with intense violence in Belfast.
The Taoiseach Jack Lynch ordered army field hospitals to be set up at the border and in a broadcast announced
...that the Irish government can no longer stand by....
The British Home Secretary James Callaghan agreed to the deployment of British soldiers. Following negotiations between the army and local leaders, it was agreed to pull the RUC and 'B' Specials behind the army outside the Bogside. The violence led to more deaths across Northern Ireland.