Original sentence: Cork County has the nickname of "the Rebel County," and Corkonians often refer to Cork as the "real capital of Ireland.Cork has a reputation for rebelliousness dating back to the town's support of the English pretender Perkin Warbeck in 1491 following the Wars of the Roses
Edited sentence: Cork County has the nickname of "the Rebel County", a sobriquet that Corkonians are extremeley proud of, but it is doubtful that the influence of the unsuccesful pretender has influnenced it's adoption.Cork has a reputation for rebelliousness , interestingly once  attributed to dating back to the town's support of the English pretender Perkin Warbeck in 1491 following the Wars of the Roses , but more commonly associated with [the War of Independence] between [1919] and [1922].However the English Crown pretender Warbeck found little support in Cork, or any other part of Ireland and soon returned home to England