<< from the battle of the boyne in 1690 right up to the 20th century Ireland was largely peaceful >>
Actual there was a major uprising in 1798, and localized violence waxing and waning throughout this period
Belfast had its own "issues" in 1848, 1886, and quite a few other years as well.
'Actual there was a major uprising in 1798, and localized violence waxing and waning throughout this period'
There was a fairly major uprising in America between 1861 and 1865 which accounted for more deaths than have died in all the battles of Ireland, but no-one would describe the US as anything but largely peaceful. By the standards of the day, Ireland was largely peaceful for over 200 years.