Arthur Neville Chamberlain FRS was a British politician of the Conservative Party who served as Prime Minister of the United Kingdom from May 1937 to May 1940. He is best known for his foreign policy of appeasement, and in particular for his signing of the Munich Agreement on 30 September 1938, ceding the German-speaking Sudetenland region of Czechoslovakia to Germany. Following the German invasion of Poland on 1 September 1939, which marked the beginning of the Second World War, Chamberlain announced the declaration of war on Germany two days later and led the United Kingdom through the first eight months of the war until his resignation as prime minister on 10 May 1940.
After working in business and local government, and after a short spell as Director of National Service in 1916 and 1917, Chamberlain followed his father, Joseph Chamberlain, and older half-brother, Austen Chamberlain, in becoming a Member of Parliament in the 1918 general election for the new Birmingham Ladywood division at the age of 49. He declined a junior ministerial position, remaining a backbencher until 1922. He was rapidly promoted in 1923 to Minister of Health and then Chancellor of the Exchequer.