 The South Sudanese had been residents in Uganda since the early 20th century, having come from South Sudan to serve the colonial army.Many African ethnic groups in northern Uganda inhabit both Uganda and South Sudan; allegations persist that Amin's army consisted mainly of South Sudanese soldiers.Eventually a rift developed between Amin and Obote, exacerbated by the support Amin had built within the Uganda Army by recruiting from the West Nile region, his involvement in operations to support the rebellion in southern Sudan and an attempt on Obote's life in 1969.