The Anglo-Boer War
The Anglo-Boer War (October 11, 1899 – May 31, 1902) was fought between the British Empire and two Boer states, the South African Republic (Republic of Transvaal) and the Orange Free State, over the Empire’s influence in South Africa. Though the war ended with the British being victorious and annexation of the two Boer republics, it is worth mentioning as it was the largest and costliest war that the British fought during the 19th century.
The two annexed Boer Republics would, alongside the British colonies of Cape and Natal, later form the Union of South Africa in 1910. The Union, however, came to an end on May 31, 1961, paving the way for the formation of the Republic of South Africa through the ratification of a new constitution.