Covenanters were members of a 17th-century Scottish religious and political movement, who supported a Presbyterian Church of Scotland and the primacy of its leaders in religious affairs. It originated in disputes with James VI and his son Charles I over church organisation and doctrine, but expanded into political conflict over the limits of royal authority.
In 1638, thousands of Scots signed the National Covenant, pledging to resist changes in religious practice imposed by Charles. This led to the 1639 and 1640 Bishops' Wars, which ended with the Covenanters in control of the Scottish government. In response to the Irish Rebellion of 1641, Covenanter troops were sent to Ireland, and the 1643 Solemn League and Covenant brought them into the First English Civil War on the side of Parliament.