british cameroon or the british cameroons was a league of nations mandate to the united kingdom in cameroon. it began after the british, the french and the belgians had conquered kamerun from the german empire in world war i. at the paris peace conference, in 1919 and 1920, the mandate for cameroon was granted to france and britain. the territory was roughly equivalent to a part of present-day cameroon and nigeria. the territory was bordered by french cameroon and colonial nigeria.