Ireland became the main battleground after the Glorious Revolution of 1688, when the Catholic James II left London and the English Parliament replaced him with William of Orange. The wealthier Irish Catholics backed James to try to reverse the Penal Laws and land confiscations, whereas Protestants supported William and Mary in this 'Glorious Revolution' to preserve their property in the country. James and William fought for the Kingdom of Ireland in the Williamite War, most famously at the Battle of the Boyne in 1690, where James' outnumbered forces were defeated.