May 21, 1639

Lord Deputy Thomas Wentworth imposes the Black Oath of loyalty to Charles I on all Ulster Scots over the age of 16

Ireland

Lord Deputy Thomas Wentworth imposes the Black Oath of loyalty to Charles I on all Ulster Scots over the age of 16

In 1639, Thomas Wentworth, 1st Earl of Strafford, who was the Lord Deputy of Ireland under King Charles I, imposed what became known as the “Black Oath” on the Ulster Scots population in Ireland. This controversial measure was part of Wentworth’s efforts to ensure loyalty to the Crown during a period of increasing tension between Charles I and his subjects, particularly in Scotland.

Background

The Black Oath

Impact and Legacy

The imposition of the Black Oath by Thomas Wentworth in 1639 is a significant episode in the history of Ireland and the British Isles, reflecting the broader struggles over authority, religion, and loyalty that characterized the tumultuous reign of Charles I.

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