Is it ensure, insure, or assure?
(1639, 1640), in British history, two brief campaigns that were fought between Charles I and the Scots. The wars were the result of Charles's endeavour to enforce Anglican observances in the Scottish Church and of the determination of the Scots to abolish episcopacy. A riot in Edinburgh in 1637 quickly led to national resistance in Scotland; and, when in November 1638 the General Assembly at Glasgow set Charles's orders at defiance, he gathered an English force and marched toward the border in 1639. Lacking sufficient funds and lacking confidence in his troops, however, Charles agreed, by the Pacification of Berwick, to leave the Scots alone. The first Bishops' War thus ended without battle.