The Solemn League and Covenant was an agreement between the Scottish Covenanters and the leaders of the English Parliamentarians in 1643 during the First English Civil War, a theatre of conflict in the Wars of the Three Kingdoms. On 17 August 1643, the Church of Scotland accepted it and on 25 September 1643 so did the English Parliament and the Westminster Assembly.

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. The name is derived from covenant, a biblical term for a bond or agreement with God.