The Puritans gained significant control over England after the English Civil War, specifically around the year 1649. This period marked a drastic shift in power following the execution of King Charles I and the establishment of the Commonwealth under Oliver Cromwell.
During the 1640s, tensions between the monarchy and Parliament escalated, leading to civil strife. The Puritans, who sought to reform the Church of England and eliminate practices they viewed as corrupt, became a prominent force in Parliament. Their military successes in the war enabled them to secure political dominance.
By 1649, the Puritans had effectively overthrown the monarchy, and they arranged for a republic to be formed, a significant achievement for their cause. Oliver Cromwell became the leading figure, ruling as Lord Protector and implementing Puritanical reforms that shaped the social and religious landscape of England during this time.