Spencer Compton Cavendish, Marquess of Hartington becomes British Secretary of State for War.

Spencer Compton Cavendish, 8th Duke of Devonshire, styled Lord Cavendish of Keighley between 1834 and 1858 and Marquess of Hartington between 1858 and 1891, was a British statesman. He has the distinction of having held leading positions in three political parties: leading the Liberal Party, the Liberal Unionist Party and the Conservative Party in either the House of Commons or the House of Lords. After 1886 he increasingly voted with the Conservatives. He declined to become prime minister on three occasions, because the circumstances were never right. Historian and politician Roy Jenkins said he was "too easy-going and too little of a party man." He held some passions, but he rarely displayed them regarding the most controversial issues of the day.

The secretary of state for war, commonly called the war secretary, was a secretary of state in the Government of the United Kingdom, which existed from 1794 to 1801 and from 1854 to 1964. The secretary of state for war headed the War Office and was assisted by a parliamentary under-secretary of state for war, a parliamentary private secretary who was also a member of parliament (MP), and a military Secretary, who was a general.