From 1890 to 1913, traditional viziers were in charge; they were supervised by advisors appointed by the Colonial Office. However, in 1913 a switch was made to a system of direct rule through residents (effectively governors) from 1913. The death of the pro-British Sultan Hamad bin Thuwaini on 25 August 1896 and the succession of Sultan Khalid bin Barghash, whom the British did not approve of, led to the Anglo-Zanzibar War. On the morning of 27 August 1896, ships of the Royal Navy destroyed the Beit al Hukum Palace. A cease fire was declared 38 minutes later, and to this day the bombardment stands as the shortest war in history.