their son, later James V, brought the House of Stewart into the line of descent of the House of Tudor, and the English throne. Margaret Tudor later married Archibald Douglas, 6th Earl of Angus, and their daughter, Margaret Douglas, was the mother of Henry Stuart, Lord Darnley. In 1565, Darnley married his half-cousin Mary, Queen of Scots, the daughter of James V. Darnley's father was Matthew Stewart, 4th Earl of Lennox, a member of the Stewart of Darnley branch of the House. Lennox was a descendant of Alexander Stewart, 4th High Steward of Scotland, also descended from James II, being Mary's heir presumptive. Thus Darnley was also related to Mary on his father's side and because of this connection, Mary's heirs remained part of the House of Stuart. Following John Stewart of Darnley's ennoblement for his part at the Battle of Baugé in 1421 and the grant of lands to him at Aubigny and Concressault, the Darnley Stewarts' surname was gallicised to Stuart. Both Mary, Queen of Scots, and Lord Darnley had strong claims on the English throne through their mutual grandmother Margaret Tudor. This eventually led to the accession of the couple's only child James as King of Scotland, England, and Ireland in 1603. However, this was a personal union, as the three Kingdoms shared a monarch, but had separate governments, churches, and institutions. Indeed, the personal union did not prevent an armed conflict, known as the Bishops' Wars, breaking out between England and Scotland in 1639. This was to become part of the cycle of political and military conflict that marked the reign of Charles I of England, Scotland and Ireland, culminating in a series of conflicts known as the War of the Three Kingdoms. The trial and execution of Charles I by the English Parliament in 1649 began 11 years of republican government known as the English Interregnum. Scotland initially recognised the late King's son, also called Charles, as their monarch, before being subjugated and forced to enter Cromwell's Commonwealth by General Monck's occupying army. During this period, the principal members of the House of Stuart lived in exile in mainland Europe. The younger Charles returned to Britain to assume his three thrones in 1660 as "Charles II of England, Scotland and Ireland" - with the support of General Monck - but dated his reign from his father's death eleven years before. In feudal and dynastic terms,