TANU was built by Dar es Salaam Muslims
The organisational base of Tanganyika's nationalist movement came from a network of urban Muslim families, traders, and activists in Dar es Salaam, centred on the Sykes brothers. They ran the Tanganyika African Association and converted it into TANU in 1954. Nyerere was brought into a political machine that already existed; he did not create one from scratch.