The protectorate was administered from Mafeking, creating an unusual situation, the capital of the territory being located outside of the territory. The area of Mafeking (from 1980 with the incorporation into Bophuthatswana Mafikeng, since 2010 Mahikeng), was called 'The Imperial Reserve'. In 1885, when the protectorate was declared, Bechuanaland was bounded to the north by the latitude of 22° south. The northern boundary of the protectorate was formally extended northward by the British to include Ngamiland, which was then dominated by the Tawana state, on 30 June 1890. This claim was formally recognised by Germany the following day by Article III of the Heligoland-Zanzibar Treaty, which confirmed the western boundary of the British protectorate of Bechuanaland and the German protectorate of South-West Africa and also created the Caprivi strip inherited by modern Namibia: