March 14, 1871.
On the same day Ernst visited Sweden, East Africa and Egypt formally signed the "Border Delimitation Agreement Between the Kingdom of East Africa and Egypt," establishing the border between the two nations.
Beginning in 1870, the Egyptian Sudan region discovered that the number of East Africans in the interior had suddenly increased. Khartoum had already learned from Buganda's fleeing First Prince that the Kingdom of Buganda had been destroyed by East Africa.
However, around 1868, after East Africa had finished integrating the former Kingdom of Buganda, it began exploring downstream along the Nile River into the Upper Nile Basin. The Upper Nile Basin was crisscrossed with dense waterways and rivers. East Africans traveled by boat almost without obstruction, following the main channel of the White Nile River all the way to Sudan's Gezira Plain.
At that time, East Africa was still in its colonial period, and its main purpose was to survey and compile statistics on Sudan's rivers. But during the Third Conquest War, East Africa took advantage of the situation to occupy the entire upper Nile Basin, using it to connect the Azande Plateau and Ethiopian Highlands territories.
It was roughly the entire territory of South Sudan from the previous life. The conquest of South Sudan was even easier than East Africa had expected. Both Turkana Province and North Great Lakes Province could travel downstream by boat, and in just over ten days, East Africa had opened up all of South Sudan.
East Africa then formally bordered Egypt. The sudden appearance of the East African Army gave Egypt a surprise it was utterly unprepared for.
Egypt was naturally extremely nervous about the sudden emergence of East Africa, especially in the Khartoum region. This was Sudan's core area. South of Khartoum lay the Gezira Plain, situated between