Following the Battle of Blaauwberg (1806) Britain had officially acquired the Cape of Good Hope in South Africa from the Dutch in 1815 after the Napoleonic Wars. Certain groups of Dutch-speaking settler farmers ("Boers") resented British rule, even though British control brought some economic benefits. Successive waves of migrations of Boer farmers (known as "Trekboers" which literally means "travelling farmers"), probed first east along the coast away from the Cape toward Natal, and thereafter north toward the interior, eventually establishing the republics that came to be known as the Orange Free State and the Transvaal (literally "across/beyond the Vaal River").