Winston Churchill was a British politician who served as Prime Minister of the United Kingdom from 1940 to 1945 and again from 1951 to 1955. He led Britain to victory in World War II and helped shape the post-war world. Churchill was born in 1874 in Oxfordshire, England. He had a long political career, serving in both the Conservative and Liberal parties. During World War II, Churchill rallied British resistance against Nazi Germany as prime minister even during Britain's darkest days. After the war, he continued to serve as prime minister until 1955 and remained an influential figure in British politics until his death in 1965.