text: By 1899, the British Government was claiming that the Congo State had not fulfilled its obligations of the Anglo-Congolese Treaty and therefore had no right to claim the Bahr-el-Ghazal. At the same time the convention was signed, the Congo State forces had occupied Rejaf, and by a tacit understanding, the State was permitted to remain in occupation of the Lado Enclave. "The Bahr-el-Ghazal has never ceased to be British, and any extension of the sphere of influence of the Congo State beyond the limits of the Lado Enclave, without the express sanction of the British Government is a wholly unjustifiable, and indeed, filibustering proceeding."
  In 1899, Leopold wanted to annul the Franco-Congolese Treaty, allowing him to gain more territory but the British opposed it, claiming that "serious consequences" would occur if Leopold attempted to expand the enclave's borders.
  In January 1900, some bored officials who had decided to explore the swamps beyond the Lado border were found by a British patrol. British officials believed this to be an official sortie and considered sending a military expedition to the enclave.
  Kiro had been the location of the British residence in the region but following the move to Congo Free State rule, a post (also called Kiro) was established a few kilometres north of the Lado Enclave's Kiro on the west bank of the Nile. However, in April 1901 it was discovered that this post lay within the enclave's territory and a new British post was created across the river at Mongalla. The British were quick to populate and arm Mongalla, with a British Inspector, police officer, two companies of the Sudanese battalion under a British officer and a gunboat stationed there.