At the Battle of the Boyne, the forces of two contenders for the English crown fought it out. (English crown, because the battle preceded the Act of Union bring

At the Battle of the Boyne, the forces of two contenders for the English crown fought it out. (English crown, because the battle preceded the Act of Union bringing Scotland and England together as the United Kingdom.) But yes, I see what you mean. [edit: Yes, and Scottish and Irish crowns, as I should have said.]