English Parliamentarian forces under Oliver Cromwell (pictured) won the Battle of Worcester, the final battle of the English Civil War.

Roundheads were the supporters of the Parliament of England during the English Civil War (1642–1651). Also known as Parliamentarians, they fought against King Charles I of England and his supporters, known as the Cavaliers or Royalists, who claimed rule by absolute monarchy and the principle of the divine right of kings. The goal of the Roundheads was to give to Parliament the supreme control over executive administration of England.

Oliver Cromwell was an English statesman, politician and soldier, widely regarded as one of the most important figures in British history. He came to prominence during the Wars of the Three Kingdoms, initially as a senior commander in the Parliamentarian army and latterly as a politician. A leading advocate of the execution of Charles I in January 1649, which led to the establishment of the Commonwealth of England, Cromwell ruled as Lord Protector from December 1653 until his death.

The Battle of Worcester took place on 3 September 1651 in and around the city of Worcester, England and was the last major battle of the 1642 to 1651 Wars of the Three Kingdoms. A Parliamentarian army of around 28,000 under Oliver Cromwell defeated a largely Scottish Royalist force of 16,000 led by Charles II of England and Scotland.

The English Civil War or Great Rebellion was a series of civil wars and political machinations between Royalists and Parliamentarians in the Kingdom of England from 1642 to 1651. Part of the wider 1639 to 1653 Wars of the Three Kingdoms, the struggle consisted of the First English Civil War and the Second English Civil War. The Anglo-Scottish War of 1650 to 1652 is sometimes referred to as the Third English Civil War.