Sir Winston Leonard Spencer Churchill, KG, OM, CH, TD, FRS, PC (30 November 1874 – 24 January 1965) was a British politician known chiefly for his leadership of the United Kingdom during World War II. He served as Prime Minister from 1940 to 1945 and again from 1951 to 1955. A noted statesman and orator, Churchill was also an officer in the British Army, historian, writer, and artist. He was the only British Prime Minister to have received the Nobel Prize in Literature and the first person to be recognized as an Honorary Citizen of the United States.

During his army career, Churchill saw military action in India, in the Sudan and the Second Boer War. He gained fame and notoriety as a war correspondent and through contemporary books he wrote describing the campaigns. He also served briefly in the British Army on the Western Front in World War I, commanding the 6th Battalion of the Royal Scots Fusiliers.

At the forefront of the political scene for almost fifty years, he held many political and cabinet positions. Before the First World War, he served as President of the Board of Trade, Home Secretary and First Lord of the Admiralty as part of the Asquith Liberal government. During the war he continued as First Lord of the Admiralty until the disastrous Gallipoli Campaign caused his departure from government. He returned as Minister of Munitions, Secretary of State for War and Secretary of State for Air. In the interwar years, he served as Chancellor of the Exchequer in the Conservative government.