Treaty of Ripon is agreed, ending the Second Bishops’ War and forcing Charles I to summon the Long Parliament, ultimately leading to the First English Civil War.

The Treaty of Ripon was a truce between Charles I, King of England, and the Covenanters, a Scottish political movement, which brought a cessation of hostilities to the Second Bishops' War.

The Bishops' Wars were two separate conflicts fought in 1639 and 1640 between Scotland and England, with Scottish Royalists allied to England. They were the first of the Wars of the Three Kingdoms, which also include the First and Second English Civil Wars, the Irish Confederate Wars, and the 1650 to 1652 Anglo-Scottish War.

Charles I was King of England, Scotland, and Ireland from 27 March 1625 until his execution in 1649.

The Long Parliament was an English Parliament which lasted from 1640 until 1660, making it the longest-lasting Parliament in English and British history. It followed the fiasco of the Short Parliament, which had convened for only three weeks during the spring of 1640 after an 11-year parliamentary absence. In September 1640, King Charles I issued writs summoning a parliament to convene on 3 November 1640. He intended it to pass financial bills, a step made necessary by the costs of the Bishops' Wars against Scotland. The Long Parliament received its name from the fact that, by Act of Parliament, it stipulated it could be dissolved only with agreement of the members; and those members did not agree to its dissolution until 16 March 1660, after the English Civil War and near the close of the Interregnum.

The First English Civil War took place in England and Wales from 1642 to 1646, and forms part of the 1639 to 1653 Wars of the Three Kingdoms. An estimated 15% to 20% of adult males in England and Wales served in the military at some point between 1639 and 1653, while around 4% of the total population died from war-related causes. These figures illustrate the widespread impact of the conflict on society, and the bitterness it engendered as a result.