Engagers
From Freepedia
The Engagers in Scottish history were a moderate faction of the Covenanter movement, who ruled Scotland during the Wars of the Three Kingdoms. The Covenanters had fought on the side of the English Parliament in the first English Civil War, but after the Parliament's victory they feared being sidelined - especially by the more radical "independent" faction that had come to the fore in England, under Oliver Cromwell. As a result, they signed a secret treaty with Charles I in 1647, known as the engagement which promised that Charles would support the establishment of Presbyterianism in return for a military alliance. The Engagers sent an army to England to try and enfore this deal, but were routed by Cromwell at the battle of Preston in 1648. This defeat discredited the Engager party. The more radical Covenanters, known as the Kirk Party, insisted that any future deal with the King or other would have to include the public endorsment of their demands and not the secret promise of concessions in the future. Charles agreed to their demands in the Treaty of Breda (1650), but his defeat at the hands of Oliver Cromwell negated any agreements he had made with the Covenanters.
See also
http://www.british-civil-wars.co.uk/glossary/engager.htm
