主教戦争
After a period of peace, Tantallon again saw military action during the Bishops' Wars in 1639. The Douglas family had remained Catholic after the Scottish Reformation, incurring the wrath of the Presbyterian Covenanters, who opposed Charles I's attempts to interfere with the Scottish Church. In 1639, the Covenanters captured Tantallon while William, newly created Marquess of Douglas, was in Edinburgh.