In 1872, after a long political battle, the Cape of Good Hope achieved responsible government under its first Prime Minister, John Molteno. Henceforth, an elected Prime Minister and his cabinet had total responsibility for the affairs of the country. A period of strong economic growth and social development ensued, and the eastern-western division was largely laid to rest. The system of multi-racial franchise also began a slow and fragile growth in political inclusiveness, and ethnic tensions subsided. In 1877, the state expanded by annexing Griqualand West and Griqualand East – that is, the Mount Currie district (Kokstad). The emergence of two Boer mini-republics along the Missionary Road resulted in 1885 in the Warren Expedition, sent to annex the republics of Stellaland and Goshen. Major-General Charles Warren annexed the land south of the Molopo River as the colony of British Bechuanaland and proclaimed a protectorate over the land lying to its north. Vryburg, the capital of Stellaland, became capital of British Bechuanaland, while Mafeking (now Mahikeng), although situated south of the protectorate border, became the protectorate's administrative centre. The border between the protectorate and the colony ran along the Molopo and Nossob rivers. In 1895 British Bechuanaland became part of the Cape Colony.