Why call the conflict the Wars of the Three Kingdoms rather than simply the English Civil War?
Short answerBecause the wars involved several kingdoms and grew partly from the Scottish crisis and the struggle over who would control the king's army.
NotesEnglish Civil War is too narrow a label because the conflict spread across England, Scotland, Ireland, and Wales. Scotland remained its own kingdom, Ireland was another kingdom, and Wales was a principality within the English crown's realm. Part of the crisis is traced to the Bishops' Wars and Charles I's attempt to raise forces against the Scots. Parliament's concern extended beyond the existence of an army to whether the king might turn it against Parliament itself.