Oliver Cromwell (25 April 1599 – 3 September 1658) was an English politician and military officer who is widely regarded as one of the most important statesmen in English history. He came to prominence during the 1639 to 1651 Wars of the Three Kingdoms, first as a senior commander in the Parliamentarian army and then as a politician. A leading advocate of the execution of Charles I in January 1649, which led to the establishment of the Republican Commonwealth of England, Scotland and Ireland, he ruled as Lord Protector from December 1653 until his death in September 1658. Cromwell nevertheless remains a deeply controversial figure in both Britain and Ireland, due to his use of the military to first acquire, then retain political power, and the brutality of his 1649 Irish campaign.