Montrose fought for the Covenanters in the Bishops Wars; unlike England, Covenanters and Scottish Royalists both agreed monarchy itself was divinely ordered but differed on who held primacy in religious affairs. This meant many Scots like Montrose fought on both sides at various times; both the Second and Third English Civil Wars were fought by the Covenanter governments to restore first Charles I, then his son back on the English throne. In June 1644, O'Cahan's Regiment was shipped to Scotland with the other parts of the Brigade.