Ormonde's Royalists still held most of Munster, but were outflanked by a mutiny of their own garrison in Ireland. The British Protestant troops there had been fighting for the Parliament up to 1648 and resented fighting with the Confederates. Their mutiny handed Cork and most of Munster to Cromwell and they defeated the local Irish garrison at the Battle of Macroom. The Irish and Royalist forces retreated behind the River Shannon into Connacht or (in the case of the remaining Munster forces) into the fastness of County Kerry.