Original: George IV ( George Augustus Frederick ; 12 August 1762 -- 26 June 1830 ) was the King of Hanover and the United Kingdom of Great Britain and Ireland from the death of his father , George III , on 29 January 1820 until his own death ten years later .
Simplified: The Regency , Georges nine-year time as '' Prince Regent '' , which started in 1811 and ended with George IIIs death in 1820 , included winning the Napoleonic Wars in Europe .