1648. In the Second English Civil War, Parliamentarians again defeated the Royalists and a Covenanter faction called the Engagers. The Parliamentarian New Model Army then purged England's parliament of those who wanted to continue negotiations with the king. The resulting Rump Parliament approved his execution in January 1649 and founded the republican Commonwealth of England. In the Treaty of Breda, the Scots agreed to restore Charles II to the English throne, but were defeated in the 1650–1652 Anglo-Scottish war. Under Oliver Cromwell, the Commonwealth conquered Ireland and most Irish Catholic lands were seized. The British Isles became a united republic ruled by Cromwell and dominated by the army. There were sporadic uprisings until the monarchy was restored in 1660. Nomenclature The term Wars of the Three Kingdoms first appears in A Brief Chronicle of all the Chief Actions so fatally Falling out in the three Kingdoms by James Heath, published in 1662, but historian Ian Gentles argues "there is no stable, agreed title for the events....which have been variously labelled the Great Rebellion, the Puritan Revolution, the English Civil War, the English Revolution and… the Wars of the Three Kingdoms." It is generally used by modern historians who see the conflicts in each state as driven by overlapping but often distinct issues, rather than as mere background to the English Civil War, while others have labelled them the British Civil Wars. Background General After 1541, monarchs of England styled their Irish territory as a Kingdom—replacing the Lordship of Ireland—and ruled there with the assistance of a separate Irish Parliament. Also, with the Laws in Wales Acts 1535 and 1542, Henry VIII integrated Wales more closely into the Kingdom of England. Scotland, the third separate kingdom, was governed by the House of Stuart. By means of the English Reformation, King Henry VIII made himself head of the Protestant Church of England and outlawed Catholicism in England and Wales. In the course of the 16th century Protestantism became intimately associated with national identity in England; Catholicism had come to be seen as the national enemy, particularly as it was embodied in the rivals France and Spain. Catholicism, however, remained the religion of most people in Ireland and for many Irish it was a symbol of native resistance to the Tudor conquest of Ireland. In the Kingdom of Scotland, the Protestant Reformation was a popular movement led by John Knox. The Scottish Parliament