The English Civil War and Commonwealth period marked a pivotal transformation in British history, featuring intense battles between Royalists and Parliamentarians, culminating in the execution of Charles I and establishment of a Puritan-led republic under Oliver Cromwell's leadership.
• The conflict (1642-1649) represented both a religious struggle and a class conflict between aristocratic landowners and the rising middle class
• Oliver Cromwell's military reforms created a professional, disciplined army that proved decisive in the Parliamentarian victory
• The Commonwealth period introduced significant political and religious reforms, including strict Puritan rules and military governance
• The period ended with the Restoration of the monarchy in 1660, bringing Charles II to the throne