1899
To limit the power of imperial rivals to secure egypt and therefore the canal, shares etc
British and French forces almost went to war at Fashoda in the Sudan in 1898. The French were trying to gain control of the upper Nile to keep Britain out of Sudan.
Biggest British African possession: Anglo-Egyptian Sudan
Both Britain and Egypt claimed dominion over Sudan during the first half of the 20th century. Due to a lot of strife in the region, both of these countries decided to allow Sudan to choose whether or not they wanted independence. A the beginning of 1956, the new country of Sudan raised its flag for the first time, having voted for independence.
Yes now it is south sudan and just plain old sudan
Yes, but indirectly. Sudan was part of the Khedivite Sultanate in Egypt which Britain ruled via a protectorate as opposed to a colony.
The colonial rulers of South Sudan was Great Britain.
Great Britain was the colonial ruler of South Sudan.
1899
Britain
Bulgaria
Sudan, china, britain
1956
To limit the power of imperial rivals to secure egypt and therefore the canal, shares etc
France an Britain
Sudan became independent in 1956. The Sudanese people are still ruled by a dictatorship, though, so they are not truly free.
Sudan was part of the main shipping route to the East. Britain needed to control the Suez Canal.