Disputes with Somalia over the Northern Frontier District (NFD) continued; for much of Kenyatta's rule, Somalia remained the major threat to his government. To deal with sporadic violence in the region by Somali "shifta" guerrillas, Kenyatta sent soldiers into the region in December 1963 and gave them broad powers of arrest and seizure in the NFD in September 1964. British troops were assigned to assist the Kenyan Army in the region. Kenyatta also faced domestic opposition: in January 1964, sections of the army launched a mutiny in Nairobi, and Kenyatta called on the British Army to put down the rebellion. Similar armed uprisings had taken place that month in neighboring Uganda and Tanganyika. Kenyatta was outraged and shaken by the mutiny. He publicly rebuked the mutineers, emphasising the need for law and order in Kenya. To prevent further military unrest, he brought in a review of the salaries of the army, police, and prison staff, leading to pay rises. Kenyatta also wanted to contain parliamentary opposition and at Kenyatta's prompting, in November 1964 KADU officially dissolved and its representatives joined KANU. Two of the senior members of KADU, Ronald Ngala and Daniel arap Moi, subsequently became some of Kenyatta's most loyal supporters. Kenya therefore became a "de facto" one-party state.