The First English Civil War took place in England and Wales from 1642 to 1646, and forms part of the 1639 to 1653 Wars of the Three Kingdoms. An estimated 15% to 20% of adult males in England and Wales served in the military at some point between 1639 and 1653, while around 4% of the total population died from war-related causes. These figures illustrate the widespread impact of the conflict on society, and the bitterness it engendered as a result.
Conflict over the role of Parliament and religious practice dated from the accession of James VI and I in 1603. These tensions culminated in the imposition of Personal Rule in 1629 by his son, Charles I, who recalled Parliament in April and November 1640. He hoped by doing so to obtain funding that would enable him to reverse his defeat by Scots Covenanters in the Bishops' Wars, but in return Parliament demanded a greater share in government than he was willing to concede.