Act for the Settlement of Ireland 1652
The Act for the Settling of Ireland imposed penalties including death and land confiscation against Irish civilians and combatants after the Irish Rebellion of 1641 and subsequent unrest. British historian John Morrill wrote that the act and associated forced movements represented "perhaps the greatest exercise in ethnic cleansing in early modern Europe".
Source: Wikipedia — Act for the Settlement of Ireland 1652 (CC BY-SA 4.0)