The Lord Deputy of Ireland was the representative of the English monarch in Ireland during the late medieval and early modern periods. This official was responsible for governing the country, overseeing law and order, and managing relations with local Irish chieftains and English settlers. The position was crucial for maintaining English control over Ireland. The role of the Lord Deputy often involved military leadership, as conflicts with Irish clans were common. Notable figures who held this title include Thomas Wentworth and Henry Sidney. The position eventually evolved into the role of the Lord Lieutenant of Ireland in the 19th century.