The Battle of Worcester took place on 3 September 1651 at Worcester, England and was the final battle of the English Civil War. Oliver Cromwell and the Parliamentarians defeated the Royalist, predominantly Scottish, forces of King Charles II. The 16,000 Royalist forces were overwhelmed by the 28,000 strong "New Model Army" of Cromwell.

The king was aided by Scottish allies and was attempting to regain the throne that had been lost when his father Charles I was executed. The commander of the Scots, Sir David Leslie, supported the plan of fighting in Scotland, where royal support was strongest. Charles, however, insisted on making war in England. He calculated that Cromwell's campaign north of the River Forth would allow the main Scottish Royalist army which was south of the Forth to steal the march on the Roundhead New Model Army in a race to London. He hoped to rally not merely the old faithful Royalists, but also the overwhelming numerical strength of the English Presbyterians to his standard. He calculated that his alliance with the Scottish Presbyterian Covenanters and his signing of the Solemn League and Covenant would encourage English Presbyterians to support him against the English Independent faction which had grown in power over the last few years. The Royalist army was kept well in hand, no excesses were allowed, and in a week the Royalists covered 150 miles in marked contrast to the Duke of Hamilton's ill-fated expedition of 1648. On 8 August the troops were given a well-earned rest between Penrith and Kendal.

The City of Worcester, commonly known as Worcester, (ⁱ/ˈwʊstər/ WUUS-tər), is a city and county town of Worcestershire in the West Midlands of England. Worcester is situated some 30 miles (48 km) southwest of Birmingham and 29 miles (47 km) north of Gloucester, and has an approximate population of 94,000 people. The River Severn runs through the middle of the city, overlooked by the twelfth-century Worcester Cathedral. The site of the final battle of the Civil War, Worcester was where Oliver Cromwell's New Model Army defeated King Charles II's Cavaliers, resulting in the English Interregnum, the ten-year period during which England and Wales became a republic. Worcester was the home of Royal Worcester Porcelain and the birthplace of the composer Sir Edward Elgar. It houses the Lea and Perrins factory where the traditional Worcestershire Sauce is made, and is home to one of the UK's fastest growing universities, the University of Worcester.

Occupation of the site of Worcester can be dated back to Neolithic times, a village surrounded by defensive ramparts having been founded on the eastern bank of the River Severn in around 400 BC. The position, which commanded a ford on the river, was used in the first century by the Romans to establish what may at first have been a fort on the military route from Glevum (Gloucester) to Viroconium (Wroxeter) but which soon developed – as the frontier of the empire was pushed westwards – into an industrial town with its own pottery kilns and iron-smelting plants.

Oliver Cromwell (25 April 1599 – 3 September 1658) was an English military and political leader who was part of the joint republican, military and parliamentarian effort that overthrew the Stuart monarchy as a result of the English Civil War, and was subsequently invited by his fellow leaders to assume a head of state role in 1653. As such, Cromwell ruled as "Lord Protector" for a five-year segment (1653–58) of the 11-year period of republican Commonwealth and protectorate rule of England, and nominally of Ireland, Wales and Scotland. As one of the commanders of the New Model Army, he played an important role in the defeat of the King's forces, the royalists in the English Civil War. After the execution of King Charles I in 1649, Cromwell dominated the short-lived Commonwealth of England, conquered Ireland and Scotland, ruling as Lord Protector from 1653 until his death in 1658.

Cromwell was born into the ranks of the middle gentry, and remained relatively obscure for the first 40 years of his life. Along with his brother, Henry, he kept a small holding of chickens and sheep, selling eggs and wool to support himself. His lifestyle resembled that of a yeoman farmer until he received an inheritance from his uncle. After undergoing a religious conversion during the same decade, Cromwell made an independent style of puritanism an essential part of his life. He took a generally (but not completely) tolerant view towards the many Protestant sects of his period. As a ruler he executed an aggressive and effective foreign policy and did as much as any English leader to shape the future of the land he governed. But his Commonwealth collapsed after his death and the royal family was restored in 1660. An intensely religious man—a self-styled Puritan Moses — he fervently believed God was guiding his victories.