British Empire
Cape to Cairo

The Dutch East India Company had founded the Dutch Cape Colony on the southern tip of Africa in 1652 as a way station for its ships travelling to and from its colonies in the East Indies. Britain formally acquired the colony, and its large Afrikaner (or Boer) population in 1806, having occupied it in 1795 to prevent its falling into French hands during the Flanders Campaign. British immigration to the Cape Colony began to rise after 1820, and pushed thousands of Boers, resentful of British rule, northwards to found their own—mostly short-lived— independent republics, during the Great Trek of the late 1830s and early 1840s. In the process the Voortrekkers clashed repeatedly with the British, who had their own agenda with regard to colonial expansion in South Africa and to the various native African polities, including those of the Sotho people and the Zulu Kingdom. Eventually, the Boers established two republics that had a longer lifespan: the South African Republic or Transvaal Republic (1852–1877; 1881–1902) and the Orange Free State (1854–1902). In 1902 Britain occupied both republics, concluding a treaty with the two Boer Republics following the Second Boer War (1899–1902).

In 1869 the Suez Canal opened under Napoleon III, linking the Mediterranean Sea with the Indian Ocean. Initially the Canal was opposed by the British; but once opened, its strategic value was quickly recognised and became the "jugular vein of the Empire". In 1875, the Conservative government of Benjamin Disraeli bought the indebted Egyptian ruler Isma'il Pasha 's 44 per cent shareholding in the Suez Canal for £4 million (equivalent to £ 480 million in 2023). Although this did not grant outright control of the strategic waterway, it did give Britain leverage. Joint Anglo-French financial control over Egypt ended in outright British occupation in 1882. Although Britain controlled the Khedivate of Egypt into the 20th century, it was officially a vassal state of the Ottoman Empire and not part of the British Empire. The French were still majority shareholders and attempted to weaken the British position, but a compromise was reached with the 1888 Convention of Constantinople, which made the Canal officially neutral territory.

With competitive French, Belgian and Portuguese activity in the lower Congo River region undermining orderly colonisation of tropical Africa, the Berlin Conference of 1884–85 was held to regulate the competition between the European powers in what was called the " Scramble for Africa " by defining "effective occupation" as the criterion for international recognition of territorial claims. The scramble continued into the 1890s, and caused Britain to reconsider its decision in 1885 to withdraw from Sudan. A joint force of British and Egyptian troops defeated the Mahdist Army in 1896 and rebuffed an attempted French invasion at Fashoda in 1898. Sudan was nominally made an Anglo-Egyptian condominium, but a British colony in reality.

British gains in Southern and East Africa prompted Cecil Rhodes, pioneer of British expansion in Southern Africa, to urge a " Cape to Cairo " railway linking the strategically important Suez Canal to the mineral-rich south of the continent. During the 1880s and 1890s, Rhodes, with his privately owned British South Africa Company, occupied and annexed territories named after him, Rhodesia.
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