Northern Frontier District
The Northern Frontier Province or Northern Province, or initially referred to as 'Northern Frontier District' (NFD) was one of the provinces of British Kenya. Originally, the Northern Frontier covered the northern region of East Africa Protectorate later succeeded by British Kenya, it later included half of the Jubaland Province that remained as part of Kenya when the other half was ceded to the Italian Empire.
Source: Wikipedia — Northern Frontier District (CC BY-SA 4.0)