The Uganda Agreement of 1900 (see Native Agreement and Buganda Native Laws, Laws of the Uganda Agreement (alternatively the Treaty of Mengo) of March 1900 formalized relations between the Kingdom of Uganda and the British protectorate of Uganda.[ 1] It was amended by the Buganda Agreement of 1955 and the Buganda Agreement of 1961. By establishing Uganda`s northern border as the Kafu River, the Colvile Agreement of 1894 formalized that Uganda would obtain certain areas in exchange for their support against Bunyoro.  Two of the « lost counties » (Buyaga and Bugangaizi) were returned to Bunyoro after the referendum on lost counties in Uganda in 1964. In 1935, Sir Philip Mitchell arrived in Uganda as governor after serving in Tanganjika for the past sixteen years. He was convinced that the relationship between Uganda and the protective power should have a different character than that of the local authorities and the Tanganjika government.  Recognizing that the early protectorate had produced a pattern of growing distrust and clandestine change, Mitchell devised a plan to reform and restructure the system between the protectorate government and the Buganda government.  In asserting that the relationship between the protectorate government and the government of Buganda`s mother was that of protected and non-indirect domination, he planned to replace the post of provincial commissioner of Buganda with a resident and to remove district officials from the centre, provided that Kabaka was required to follow the advice of the resident and his collaborators.  However, under the Ugandan Convention of 1900, Kabaka was only required to respond to such advice in the case of the implementation of the Lukiiko resolutions. Relations between Kabaka, the protectorate government and its ministers deteriorated and, due to the limited power of the governor under the 1900 agreement to impose its council on Kabaka, the reorganization led to a steady decline in the influence that the protectorate government could exert in Buganda.
 Assuming that the territory of the Kingdom of Uganda, which consists within the borders of the agreement, amounts to 19,600 square miles, it is divided into the following proportions: unlike the treaties of 1893 and 1894, the Ugandan convention of 1900 included clear borders of the Kingdom of Uganda, a land system and a tax policy.  20. If, in the first two years following the signing of this agreement, the Kingdom of Uganda does not pay the Ugandan administration, the amount of national taxation is half the number of inhabitants; or should, at any time, not pay, without reason or excuse, the aforementioned minimum taxes due in relation to the population; or the Kabaka, ugandan leaders or people should at all times adopt a policy clearly unfaithful to the British protectorate; Her Majesty`s government will no longer be bound by the terms of this agreement. On the other hand, if the revenue from the shack and arms tax exceeds a total value of $45,000 per year for two years, Kabaka and district chiefs have the right to call on Her Majesty`s government to increase subsidies to Kabaka and grants for ministers and local leaders. that this increase is in the same proportional ratio as the increase in income from the taxation of indigenous peoples. The agreement stipulated that Kabaka should exercise direct control over the indigenous people of Buganda, who administer justice by Lukiiko and its officials.  He also consolidated the power of Bakungu`s majority-Protestant client leaders, led by Kagwa.