<P> The Class B mandates were: </P> <Ul> <Li> Ruanda - Urundi (Belgium), from 20 July 1922 to 13 December 1946 . Formerly two separate German protectorates, they were joined as a single mandate on 20 July 1922 . From 1 March 1926 to 30 June 1960, Ruanda - Urundi was in administrative union with the neighbouring colony of Belgian Congo . After 13 December 1946, it became a United Nations Trust Territory, remaining under Belgian administration until the separate nations of Rwanda and Burundi gained independence on 1 July 1962 . </Li> <Li> Tanganyika (United Kingdom), from 20 July 1922 to 11 December 1946 . It became a United Nations Trust Territory on 11 December 1946, and was granted internal self - rule on 1 May 1961 . On 9 December 1961, it became independent while retaining the British monarch as nominal head of state, transforming into a republic on the same day the next year . On 26 April 1964, Tanganyika merged with the neighbouring island of Zanzibar to become the modern nation of Tanzania . </Li> <Li> Kamerun was split on 20 July 1922 into British Cameroons (under a Resident) and French Cameroun (under a Commissioner until 27 August 1940, then under a governor), on 13 December 1946 transformed into United Nations Trust Territories, again a British (successively under senior district officers officiating as Resident, a Special Resident and Commissioners) and a French Trust (under a Haut Commissaire) </Li> <Li> Togoland was split into British Togoland (under an Administrator, a post filled by the colonial Governor of the British Gold Coast (present Ghana) except 30 September 1920--11 October 1923 Francis Walter Fillon Jackson) and French Togoland (under a Commissioner) (United Kingdom and France), 20 July 1922 separate Mandates, transformed on 13 December 1946 into United Nations trust territories, French Togoland (under a Commissioner till 30 August 1956, then under a High Commissioner as Autonomous Republic of Togo) and British Togoland (as before; on 13 December 1956 it ceased to exist as it became part of Ghana) </Li> </Ul> <Li> Ruanda - Urundi (Belgium), from 20 July 1922 to 13 December 1946 . Formerly two separate German protectorates, they were joined as a single mandate on 20 July 1922 . From 1 March 1926 to 30 June 1960, Ruanda - Urundi was in administrative union with the neighbouring colony of Belgian Congo . After 13 December 1946, it became a United Nations Trust Territory, remaining under Belgian administration until the separate nations of Rwanda and Burundi gained independence on 1 July 1962 . </Li> <Li> Tanganyika (United Kingdom), from 20 July 1922 to 11 December 1946 . It became a United Nations Trust Territory on 11 December 1946, and was granted internal self - rule on 1 May 1961 . On 9 December 1961, it became independent while retaining the British monarch as nominal head of state, transforming into a republic on the same day the next year . On 26 April 1964, Tanganyika merged with the neighbouring island of Zanzibar to become the modern nation of Tanzania . </Li>

During the 1920s iraq was ruled by britain under a league of nations mandate