Churchill was born into the aristocratic family of the Dukes of Marlborough. His father, Lord Randolph Churchill, was a charismatic politician who served as Chancellor of the Exchequer; his mother, Jenny Jerome, an American socialite. As a young army officer, he saw action in British India, the Sudan and the Second Boer War. He gained fame as a war correspondent and through books he wrote about his campaigns.
Out of office and politically "in the wilderness" during the 1930s, Churchill took the lead in warning about the danger from Hitler and in campaigning for rearmament. On the outbreak of the Second World War, he was again appointed First Lord of the Admiralty. Following the resignation of Neville Chamberlain on 10 May 1940, Churchill became Prime Minister. His steadfast refusal to consider defeat, surrender or a compromise peace helped inspire British resistance, especially during the difficult early days of the War when Britain stood alone in its active opposition to Hitler. Churchill was particularly noted for his speeches and radio broadcasts, which helped inspire the British people. He led Britain as Prime Minister until victory had been secured over Nazi Germany.