Cromwellian conquest of Ireland

Cromwellian conquest of Ireland
Part of the Irish Confederate Wars
Oliver Cromwell, who landed in Ireland in 1649 to re-conquer the country on behalf of the English Parliament. He left in 1650, having taken eastern and southern Ireland, passing his command to Henry Ireton.
Date 15 August 1649 – 27 September 1653 Location Ireland Result English Parliamentarian victory English Parliamentarian conquest of Ireland End of the Irish Catholic Confederation Destruction of the Irish Catholic landed gentry Act for the Settlement of Ireland 1652
Belligerents
Irish Catholic Confederation English Royalists	English Parliamentarian New Model Army Protestant colonists
Commanders and leaders
James Butler, Marquess of Ormonde (Aug. 1649 – Dec. 1650) Ulick Burke, Earl of Clanricarde (Dec. 1650 – Apr. 1653)	Oliver Cromwell (Aug. 1649 – May 1650) Henry Ireton (May 1650 – Nov. 1651) Charles Fleetwood (Nov. 1651 – Apr. 1653)
Strength
Up to 60,000 incl. guerrilla fighters, but only around 20,000 at any one time	~30,000 New Model Army troops, ~10,000 troops raised in Ireland or based there before campaign
Casualties and losses
Unknown; 15,000–20,000 battlefield casualties ~50,000 deported as indentured labourers[1][2]	8,000 New Model Army soldiers killed, ~7,000 locally raised soldiers killed
200,000–600,000 civilian casualties (from war-related violence, famine or disease)[3]

The Cromwellian conquest of Ireland or Cromwellian war in Ireland (1649–1653) was the re-conquest of Ireland by the forces of the English Parliament, led by Oliver Cromwell, during the Wars of the Three Kingdoms. Cromwell invaded Ireland with the New Model Army on behalf of England's Rump Parliament in August 1649.

Following the Irish Rebellion of 1641 against King Charles I, most of Ireland came under the control of the Irish Catholic Confederation. In early 1649, the Confederates allied with the English Royalists, who had been defeated by the Parliamentarians in the English Civil War. By May 1652, Cromwell's Parliamentarian army had defeated the Confederate and Royalist coalition in Ireland and occupied the country, ending the Irish Confederate Wars (or Eleven Years' War). However, guerrilla warfare continued for a further year. As punishment for the rebellion of 1641, Parliament passed more Penal Laws against Roman Catholics (the majority of the population) and confiscated large amounts of their land, which was given to former Parliamentarian soldiers. It is a myth that the Catholic landowners were all transplanted to Connacht. The Act of Settlement 1652 formalised the change in land ownership. Catholics were barred from the Irish Parliament altogether, forbidden to live in towns and from marrying Protestants.

The Parliamentarian struggle with Royalists was brutal and in Nationalist ideology, Cromwell became a reviled figure in Ireland.^[4] The extent to which Cromwell, who was in direct command for the first year of the campaign, was responsible for the atrocities is debated to this day. Some authors^[5] have argued that the actions of Cromwell were within what many empires at the time viewed as accepted rules of war, while many academic historians disagree.^[6]

The impact of the war on the Irish population was unquestionably severe and although there is no consensus as to the magnitude of the loss of life, most modern estimates generally fall in between 15 and 50% of the native population. The war resulted in famine,^{[7][8][9][10]} which was worsened by an outbreak of bubonic plague. Older estimates of the drop in the Irish population resulting from the Parliamentarian campaign reach as high as 83 percent.^[11] The Parliamentarians also transported about 50,000 people as indentured labourers to the English colonies in North America and the Caribbean.^[1] Some estimates cover population losses over the course of the Conquest Period (1649–52) only,^[12] while others cover the period of the Conquest to 1653 and the period of the Cromwellian Settlement from August 1652 to 1659 together.