The Engagers were a faction of the Scottish Covenanters, who made "The Engagement" with King Charles I in December 1647 while he was imprisoned in Carisbrooke Castle by the English Parliamentarians after his defeat in the First Civil War.
A Covenanter's helmet from the period in the Museum of Edinburgh
The Solemn League and Covenant agreed by English and Scottish Presbyterians in 1643
James Graham, Marquis of Montrose; Royalist commander in Scotland 1644–1645, but a Covenanter general 1638 to 1640
Marquess of Argyll, whose Kirk Party opposed the Engagement
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.
Greyfriars Kirkyard, where the National Covenant was signed in 1638
John Knox, who founded the reformed Church of Scotland or Kirk
1637 riots over the Book of Common Prayer
Covenanter political leader, the Marquess of Argyll