The deposed Sultan made an unsuccessful appeal to Kenya and Tanganyika for military assistance, although Tanganyika sent 100 paramilitary police officers to Zanzibar to contain rioting. Other than the Tanganyika Rifles (formerly the colonial King's African Rifles), the police were the only armed force in Tanganyika, and on 20 January the police absence led the entire Rifles regiment to mutiny. Dissatisfied with their low pay rates and with the slow progress of the replacement of their British officers with Africans, the soldiers' mutiny sparked similar uprisings in both Uganda and Kenya. However, order on the African mainland was rapidly restored without serious incident by the British Army and Royal Marines.