Charles II's father, Charles I, was executed at Whitehall on 30 January 1649, at the climax of the English Civil War. Although the Parliament of Scotland proclaimed Charles II King on 5 February 1649, England entered the period known as the English Interregnum or the English Commonwealth, and the country was a de facto republic, led by Oliver Cromwell. Cromwell defeated Charles II at the Battle of Worcester on 3 September 1651, and Charles fled to mainland Europe. Cromwell became virtual dictator of England, Scotland and Ireland, and Charles spent the next nine years in exile in France, the Dutch Republic, and the Spanish Netherlands.
A political crisis that followed the death of Cromwell in 1658 resulted in the restoration of the monarchy, and Charles was invited to return to Britain. On 29 May 1660, his 30th birthday, he was received in London to public acclaim. After 1660, all legal documents were dated as if he had succeeded his father as king in 1649.
The Royal style of King Charles II was "By the Grace of God, King of England, Scotland, France and Ireland, Defender of the Faith, etc".